Blower motor only works on low speed. Have you checked the blower motor .

Blower motor only works on low speed. Blower Motor Fan Only Works On High Speed? Plus – Tips To Prevent Repeat Failures! Why Does My Car Ac Go High And Low? If your car’s AC is going high and low, it could be a sign that the compressor isn’t working properly. That's actually backwards the resistor pack is not even part of the circuit on the fan's high-speed setting, it is bypassed for the fan's highest speed. I noticed that if I turn off my head lights then the fan will start blowing at the speed it is set on the dial. Thats right paid for 3 parts and only needed one:grin:I need to learn basic electrical checks. Feb 25, 2017 · I replaced the blower motor on my '94 Monaco Dynasty since it started making squawking noises. How would I like to connect with the mechanic - through a phone call or online chat? I prefer online. I Feb 20, 2017 · Does the fan/blower work on any of the settings (low medium high) with the HVAC set to AC or Heat? The problem is likely related to how the blower motor controls is speed settings. Dec 10, 2024 · Troubleshooting a Honda blower motor? Learn how the resistor and power transistor systems work to vary blower motor speeds. Here are some steps you can take to confirm whether or not this replacement is necessary. Low and Medium speeds do not work. It is about a $60 part and only takes a few minutes to change, but being yours is an '07 model you may still be Nov 7, 2016 · Well I have the blower motor resistor on the way from Amazon, and I have some fancy aviation electrical contact cleaner, so I'll try replacing the resistor and cleaning the rheostat and see how that works out for me. It's the extra current that creates the heat that takes out the resistor . So far I have replaced the blower switch, AC High Blower Motor Cutout Relay and the AC Blower Motor Resistor and none of these have fixed the problem. The Electric Fan at the radiator seems to stay on low and never goes on high, like it did May 6, 2011 · In my 1997 Wrangler, the heater blower fan does not work on high. Aug 29, 2013 · I ran into the common problem of the fan blower only working on the high speed. Jun 24, 2007 · So, my heater/AC blower now only works when the key is OFF. Jul 14, 2014 · This is only true for the low, medium 1 & medium 2 voltages and their associated speeds. Locate the electrical connector to blower motor, trace back wiring no more than 8" to - 1997-2001 Toyota Camry Blower motor only blows on speeds 1 and 2. Apr 4, 2025 · In summary, understanding these key factors can help identify and resolve issues with an AC blower motor struggling at low speeds, ensuring better performance and comfort in indoor environments. It now works fine. Look closely at the connectors for both the speed switch and the resistor pack. This Nov 18, 2022 · General F150 Discussion - Blower motor stuck on one speed - Looking for some help on this. May 19, 2005 · Clean96noma might wont to check to see if blower motor has a high speed relay that could be you r problem and it is not the blower resistor,resistor only controls your low and medium speeds. the blower motor resistor changes the air flow. If it fails, the system runs the blower motor on high only. Now 6 mos later, HI is the only speed that works. Mechanic's Assistant: How many miles are on the car? Is it an automatic or a manual transmission? Customer: It has 201,598 miles and it's an automatic. This switch selects which wires will be used. I have a low, and a medium speed but no high speed with the heater on. so ever since I got my truck the highest speed the a/c would blow on is 2. The blower motor resistor is responsible for controlling the speed of the blower motor, which is responsible for pushing air through your car’s heating and cooling system. Apr 6, 2013 · It was behind the glovebox. In most cases, a blower Conclusion In conclusion, an AC system that only works on low can be a frustrating and uncomfortable problem for vehicle owners. Then 4 went out last week when it started getting cold outside. Usually if the resistor goes out doesn't it blow at high speed? i have speeds 2-4. The two blowers of same part number are connected directly to 12 volt in a parallel circuit for high speed. Jan 5, 2014 · This is a design flaw on GM's part, not the fault of the blower motor. Just my to cents. Normal wear and tear can cause fan belts to strain, crack, and break. When the truck is running or when the key is in the accessory position, the blower will not operate. I believe this, but, I can't find a part on line for a blower relay. 5L engine & AC and the blower motor only works at low speed. While there can be several potential causes for this issue, it is typically related to problems with the AC compressor, refrigerant leaks, a malfunctioning blower motor, a clogged cabin air filter, a faulty thermostat, or a malfunctioning control module. Dive into these symptoms If the blower motor resistor fails, your blower motor only works on high speed. Dec 14, 2015 · I have a 93 LX 2. Now the low and high work fine, but the third setting is the same speed as low. Could this be the blower resistor? Or is this another issue? This video will show you how to replace the blower motor resistor on a 2012 F150. Replacing the blower motor resistor or checking the electrical components often resolves the problem. What would cause my chevy 2500 hd blower to only work on 2, 3, and 4 setting. If the visual inspection checks ok, suspect a faulty resistor and replacement should solve the problem. it is hotter Feb 18, 2023 · The blower motor resistor’s job is to limit the blower motor’s speed. Any thoughts? When the blower motor will only work on the highest setting, this is a classic, tell-tale sign of a faulty Blower Motor Resistor. I have heard of this happening, only backwards, and the resister being the problem. Usually what happens is the blower motor gets worn bearings/bushings and pulls too many amps, which in turn burns the resistor out. Most blower motors are designed to operate at different speeds so as to able to regulate different cabin temperatures efficiently. The blower is fed through the switch and the blower resistor, if it only works on low speed the blower switch is the problem. Feb 19, 2012 · It's probably a bad blower motor resistor. This is poorly documented in the available publicatio Key Takeaways Blower motor operates only on high or low speed, indicating a potential issue with the blower motor resistor. May 28, 2019 · I have a 2011 F150 with auto climate control The blower would only work on high so I replaced the resistor. Aug 26, 2022 · If you want to know why you have a car fan that only works on high, you likely have a problem with the blower motor resistor. The Variable Blower Control (VBC) located just below the blower motor has most likely failed, and set the blower speed to "High" to keep maximum cooling airflow over its heat sink fins, which stick up inside the blower ducting. It is Jun 24, 2008 · Just the other day my A/C stopped working. 9L / 300 - Blower switch only works on low - 1993 f150 380k I had an issue last year (I only drive around 3k a year)for my blower motor only works on low speed i replaced the fan switch in the cab boom problem fixed great 😁 1 year later the problem is black not so great 🙄 so I think I have Mar 30, 2006 · 1983 - 2012 Ranger & B-Series - Blower motor only works on high or low - Anyone know what the cause may be? Or am I doomed to buy a new blower motor. Replaced the heater motor and the heater motor resistor. Switching the speed to med or high has no effect. Nov 22, 2003 · 70 with factory air. Oct 22, 2023 · One common cause is a faulty blower motor resistor. Most people don't know that the high speed blower motor fan speed setting and the medium and low speed settings are two separate electrical circuits. Have you checked the blower motor Watch the video to learn more about how blower motors and blower motor resistors can go wrong! 0:00 Car or Truck Blower Motor Only Works on One Speed? Mar 2, 2018 · 1999 - 2016 Super Duty - Blower motor works on "high" only - anyone done any troubleshooting on this? I am guessing it's a problem with the switch--and I understand the theory behind how the fan settings work (some kind of resistor wire that allows varying current to fan motor depending on where the selector is). It is likely that the low speed is still functioning properly, but the high speed is not. If this resistor begins to fail, then you will see air blow at only some of the fan speed settings. hope that helps a bit to help you locate the resistor. As a result, the heat in the plenum builds until it triggers the limit switch and shuts the system down. Jul 25, 2020 · I have a 2017 chevy trax, I just replaced the resistor and the blower motor after having issues with just the low speed working and then it not working at all. Where do I look to start correcting this problem? I tore the knob on the dash apart and looked it over and it appeared to be clean and functional. The warm weather is moving in and going to need A/C soon. Replace the blower motor resistor to fix Jun 20, 2021 · Hi all. It will work when I have the speed set to 1, but anything after that (2-3-4) and the green A/C light turns off by itself. But I have not heard of the problem happening this way. Sometimes it may stop working just at certain speeds, but in this article, we are going to mainly focus on why the blower motor won’t work on any speed. I have seen some of the postings where they think it is the blower motor resistor. Sep 5, 2010 · C3 Tech/Performance - Fan Blower Speed - only High Works - On my 1982, only the High setting on the fan blower works. In the footwell of the passenger side front seat you can see a round black molded piece of plastic, its in there. Am I correct in thinking the rotary switch in the head unit is failing? Jun 16, 2023 · The old school blower circuit tricks many. Customer: My blower motor only operates on high, but it behaves as if the fan is set to low speed. When the fan speed switch is set to OFF , power comes from the Lo Blo switch to run the fan at low speed ( refer to the Fan Speed Selector Switch chart in the upper left corner of the attached diagram ). If fan speeds 1-3 have stopped working on your vehicle, the blower motor re If your Dodge's heater or AC fan will only blow on high, or if it intermittently works on low but then stops, it is very likely your heater resistor. If the blower motor is faulty, it can fail to push air at any of its designed settings. The various airflow settings may also fail to work or you may not get any air from the vents. They use a resistor pack located in the passenger footwell (under glovebox), these resistors get hot to dissapate the blowers unused power when switched to the lower speeds. Sep 18, 2014 · I don't think the blower motor is running at a high enough rpm to supply enough cold air to the plenum. Mechanic's Assistant: What is the If the blower motor only runs on low speed despite replacing the motor and resistor, check the blower motor control module or switch. The only thing I can find is the fan switch and the resistor available for parts. Checking the old one everything looked physically intact. My blower motor only works on the first 2 speeds and not on high. The high fan speed is not affected because it's voltage does not pass through a resistor and get reduced. ), but likely indicates a failing regulator on this vehicle. Jul 5, 2010 · 1999 - 2016 Super Duty - intermittent blower motor problems - My A/C, vent fan (blower motor) keeps going in and out. I know most of you guys say that the resistor is a common issue, but symptoms for that seem to be that the fan only works in "High" and no other speeds. Oct 30, 2010 · Here is a pic where the resistor is. Jan 16, 2009 · Electrical Systems/Wiring - low blower speed doesn't work - I have a 2006 F150 and my blower doesn't work on the #1 setting. I then decided to replace the AC blower motor switch again, and that made no difference. Thanks for the assistance! Jan 23, 2018 · Can you increase the blower speed manually and without using the auto? Does the fan work on the highest manual setting? Sound like the answer is no so it could be the blower motor or also check the relays. Oct 9, 2009 · I have the AC/Heater blower on my 1996 Crown Victoria only works on 3 (high). Aug 15, 2010 · The heater/ac blower motor only works on the high position. Aug 4, 2015 · So on my truck ac compressor only turns on on fan speed one but blower works on all speeds. Learn how to fix it from an expert. Any suggestions and is there any diagram as to where the resistor is located. The temperature control unit tells the resistor module to increase or reduce the flow of electric current to the blower motor when you change the AC fan speed. Inspect the electrical connector for any loose, broken or melted wires. Apr 29, 2015 · Sounds like you have a burned out high speed winding in your fan motor. Yet when I turn the key off, then back on again, it's back to only blowing on low. The AC and the heat seem to both work. I can turn the heater or A/C on and turn the speed on low and it will not blow until it get's to the highest setting. May 23, 2024 · 2016 Trax the blower motor only works on speeds 1 2 3 will not work on high speed 4 any suggestions what could be causing this? Mar 6, 2008 · I agree with the blower motor speed resistor ,they usually put them in the air stream in the heater/a/c duct work to keep the resistors cool. Usually if the resistor is bad, the blower motor only works on HIGH since the point of the resistor is to slow the blower motor down to run on variable speeds. It will not work on low or medium. to/3I16Tx9 How to fix a blower motor resistor in a 2nd gen Tacomamore Nov 7, 2008 · If your AC/Heater Blower speed always runs 1) low or 2) high, see attachment for fix. Replaced it, lower speeds now work but it may not last long. So far, I have replaced the fan speed switch, the blower motor, and as of last night, the blower motor resistor. The resistor is new and the switch on the dash is tight. Feb 23, 2024 · 03 1500hd 210k miles Intermittently, the blower motor won't work on high (5) but works in all other positions. Medium high and high work fine. Replace the resistor should fix this. Inconsistent airflow settings may signal internal component failure or a defective blower motor switch. The most likely cause is the linear controller module for 1) , and the resister (resistor) for 2). I replaced the switch assembly and resistor, but it still only operates at low speed. What else am I missing? Could it be the power switch or something else? My car has 18000 miles. This symptom indicated a failed final stage resistor on the older models (E39, etc. The first thing I did was make sure the fan motor actually works. Does this mean that the selector switch is bad or is there seperate windings for each speed? Any help appreciated. If you try to adjust the speed, it just cuts off again. Apr 4, 2011 · Blower motor resistor is shot, its a cheap part at any auto parts store, and can be easily fixed. The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn't work at low speeds. The problem is that it still is not working g at all. As I explained way back in post #2, the blower resistor is used to control speeds 1 ~ 3. The Sep 6, 2016 · The problem I'm experiencing is I can only get a single speed from my blower motor. I removed plug that powers the blower motor I have a 96 buick lesabre, the fan for the heater only works in low speed, i changed the blower motor, heat control box Jun 7, 2005 · Hi, If your blower only works on the highest speed, this is probably why : Ford uses a crude method to slow the blower speed when you switch to the lower speeds. I already replaced the resistor, and that didn't fix the problem. Blower Stops Working or Takes Time To Start: Whenever you click the switch, you’ll witness that it suddenly stops working or takes time to start the motor. Does not do it all the time, but when it goes out, it will come back on after a few moments, but will not run full speed. When the Resistor fails, current goes right thru it and the blower only operates at max. Jul 8, 2008 · Not quite soblower motor resistor or melted fan switch FYI for future readers for this blower motor problem where only the highest setting on the fan works. The switch is always replaced when it most often is not at fault. All other functions work fine. If the resistor fails once, replace it and don't over think it. I replaced that, and pigtail, with a new after market ones. Where do I look or replace now? Also I do not have an opreators manual for fuse locations. The AC compresser is off the car right now. Anybody have clue. Could it be my switch itself? Don't know where to start May 20, 2023 · Blower motor resistor / control module problems Problems with a blower motor resistor are common in many cars. It works on speeds 1-3, but when I switch it to high it kicks off. So, it may seem like there are 4 fan speeds. It is still blowing at mod-high speed and won't shut off (hitting the off button actually increases fan speed). The temperature control works fine. We can run the air conditioner on high speed only even though the fan speed has a high and low setting choice. Feb 1, 2018 · When a blower resistor fails, the highest fan speed usually is the only one that still works because it essentially bypasses the resistor and receives the maximum amount of voltage. When you get the motor fixed, a workaround to get a low speed Fan Only is to turn the thermostat all the way down to it's minimum setting, then switch Aug 18, 2024 · When a blower motor only works on high speed, it usually indicates a problem with the blower motor resistor, which controls the fan speeds. no funny sounds, no bad smells. If the blower motor resistor is not functioning properly, it can result in the heater only working on high. So it goes low, medium, low, high when I turn the knob. It used to work when I tapped on it, but that no longer helps. 3L and the blower motor for a/c-heater only works on low no matter what position the fan speed nob is set to. Apr 25, 2022 · When I attached it, the blower fan stays on, but I can not adjust the speed nor turn it off. The guy at AutoZone told me that when installing it, it should work just like the other one, multiple speeds included. Usually what blows in the resistor is the thermal fuse, it pops because the motor is lagging and heat builds up in the resistor pack. Jul 28, 2025 · FAQs Why is my AC blowing cold on low but not on high? This could be due to a faulty blower motor resistor, which controls the speed of the blower motor. Dec 23, 2024 · Sounds like you maybe have two different faults. This issue can also be caused by a faulty fuse, relay, or wiring within the HVAC system. Has anyone else had this issue or know of a way to fix it? Thanks in advance! May 27, 2024 · Does your blower fan work on the high speed setting only? This problem is a classic blower motor resistor problem which is common on vehicles that use manual fan speed switch controls. it used to work if i selected the medium high or high speed and worked back down to medium low but now, that has stopped as well. does the comp need to be reset? Oct 3, 2010 · DerekM said: You need a new resistor most likely if it only works at low speeds. Does anyone have Mar 5, 2017 · I had an issue with my blower motor only working on high and after replacing the blower motor resistor, then replacing the blower motor itself I found the problem was the blower motor switch. May 15, 2022 · The other day my 2014 Crosstrek blower speed control stopped working on speeds 3 and 4. My car has an automatic transmission. Is my next step a new resistor or am i missing something? Aug 19, 2014 · 2009 - 2014 Ford F150 - A/C fan motor only blowing one speed? - I tried searching for this problem but had no luck. Sep 30, 2017 · Hello all, I've ran into a weird issue with my 06 f350. I cannot change speeds on my blower motor and it is stuck on one speed. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely. blower motor blowes slow only. So when the highest fan speed is working it mean the medium Jan 24, 2012 · From your description of the problem, looks like the resistor number 3 circuit is open (resistor terminal broken or cut-off), hence it only works on speed number 4 when all 3 resistance elements are bypassed, and full voltage goes to blower motor. No low or high If your blower only works on one speed this is probably the fix. If something in the motor fails, such as an electrical connection, poor wiring, or another operating issue, the fan will Aug 30, 2024 · Your car air conditioner likely only works on high due to a faulty blower motor resistor. Find out why this happens and if you should replace the blower motor and blower motor resistor together with these tips from our expert mechanics. Any ideas what would cause this? It's definitely better than only having the high speed. So your resistor was most likely faulty which is why only speed 4 worked. Link to Part: https://amzn. Furthermore, it can cause an inconsistent or intermittent fan speed, leaving you without proper airflow. Could it just be a bad selector switch? Or do I need to tear into the dash like i've been reading? Thanks in advance. This issue might be caused by a faulty relay or a failing resistor in the blower motor control module. Blksdime03 sounds like your fan clutch took a shit. As long as we start the fan on high then switch over to cool the AC run perfect and cools the camper as it should. I don't think it is the resistors because it should work on high if it were bad. If we switch it to low or auto, we can hear a click in the Aug 27, 2010 · My AC Fan High Speed not working, the 3 lower speeds are blowing without any issues. It might simply be a case of damaged or corroded connectors. For a few days when I turned on the AC or anything it wouldn't go on or it would go on and then turn off, check the fuse at the engine compartment fuse box HVAC 30 amp was burned but not blown, replaced that and May 3, 2010 · I have a early 99 powerstroke and the blower motor only works on high with both the A/C and the heater blowing. If it's not the resistor, what is the logical next thing to try? Customer: The blower motor only works on the low setting. since it only works in 4, the blower motor resistor isnt working, the system pours out only one rate of flow, high speed. Oct 24, 2018 · We recently purchased a Minnie Winnie #2101FBS year of manufacture is 2015. I can have the switch on high, turn the key on, get under the hood and unplug the motorand when I plug it back up, the motor blows wide open like it should. It is rarely the $850 electronics module in the dashboard. Mar 4, 2012 · I have a 2012 Tacoma and yesterday i noticed my HVAC blower motor only spins low speed. Dec 26, 2024 · In '68 , The Chevelle / El Camino only had 3 fan speeds, low, medium and high. Jul 30, 2007 · my A/C blowetr motor was working all right till the other day now it only blows at low seting when you move the fan speed lever to high the fan speed doesn't change i have very little experance with this system can some piont me in the general direction so i can try to fix this. Any ideas May 26, 2021 · now, as I have my general AC problem fixed by replacing the blower motor (the AC cut off completely, when the blower motor was higher than 2), I noticed the next issue, after the temps are now above 90's. Sep 18, 2005 · Right now I'm trying to figure out why my ac/heater fan motor won't work. The only way i can get it to work is turn the speed switch to off then on sometimes more than once. speed. You should use a voltmeter to check the Dec 5, 2005 · C3 Tech/Performance - Blower motor, only HI works - ok, the HI wasn't working so I replaced the switch, and it worked. (I turned the key to Accessories - does the car Apr 1, 2022 · Blower motor only blows at low speed or barely at all no matter the setting on climate control dial. After a few seconds on low one of the resistors got awfully hot. I would replace the blower motor as well. Good luck! you just gotta love the sound of a diesel engine running, Rudolph Diesel is my hero. Mar 20, 2013 · Corey, the blower motor speeds are controlled by the Blower Motor Resistor. Where is the control box for the Dec 23, 2014 · Hi, I have a 91 S10 with the 2. I have checked the A/C high and low sides and both are good. It didn't solve the problem. If it's a Coleman a/c and thermostat, the Fan selection on the Heat/Cool/Off/Fan switch only selects high fan speed, which of course won't work if your motor is defective. Jul 24, 2024 · If your blower motor works at lower speeds but not at high speed, the problem could be related to the motor's speed control. Also the A/C light comes on and works normally when in 1 and 2 but not in 3 and 4. I bought the updated OEM Toyota resistor and harness and installed them just now. Jul 16, 2018 · Andy, You've probably addressed this by now, but my blower motor has started to oscillate as I'm driving down the road, low fan, to high fan, to low, and so one, maybe on a 45 sec cycle. See relevant content for smartacfix. Does your blower motor/fan only run on high speedor not at all? In this video, we talk about the cause and effect that leads to blower motor resistor failure. Jan 25, 2015 · Okay, here's the deal. In addition, The blower motor might turn on and off randomly while you’re driving the car. I've replaced the resistor, tested the voltage, and everything appears to be functioning correctly electrically. Most likely the blower, melted blower pigtail, or melted connector at the switch. Dec 18, 2010 · If the switch only worked on setting 1 and 3, then it would be the fan switch on the dash next to the temp switch. Aug 24, 2018 · 1987 - 1996 F150 - Blower only blowing on low - About a month ago, my a/c started only blowing one speed, low, no matter what I set it on. My blower fan only operates on the high setting. Aug 14, 2024 · If your car's heater is only blowing at one speed, your blower motor could be to blame. I can put the selector on MAX A/C - Defrost, and the fan speed from low-high and it doesn't blow on any combination of settings. Dec 1, 2015 · Hey everyone! I have a question: recently, the low and medium low blower speeds have stopped working in my 1994 silverado. comContent blocked Please turn off your ad blocker. I'm not sure Dec 14, 2024 · Ford Inline Six, 200, 250, 4. I've checked the resistor, it Nov 13, 2013 · I was told that when the heater fan only works on high that it is the relay. Now the fan only works on the lower speeds When I turn it to high it runs for about 2 seconds then shuts off To restart I need to turn it to low and it will start up again Jan 20, 2008 · Your symptoms are not of a faulty blower motor resistor pack since you have reported that the blower runs on low speed in positions 1, 2, & 3. Is there a relay and where can I find it on a 94 Astro. When MAX AC is selected the blower will only operate on the highest speed. It doesn't spin or anything on low or medium. A defective or failed capacitor causes the fan motor to slow down or overheat. Complete absence of airflow from vents suggests the blower motor resistor may be cutting power entirely to the blower Customer: The blower fan is only working with two speeds. Inspect wiring harnesses for corrosion or loose connections, especially at the resistor and control module. I'd suggest focusing on the speed switch instead. I changed the resistor and it would not work at all so I took that new resistor back to auto parts store and exchanged for another new one thinking it was Oct 4, 2006 · I have a 2003 f-350 that the blower motor only works on high, meaning that when the selector is in any other position it does not turn on but once in high it blows on high speed. Nov 25, 2020 · I know that the blower motor should have 3 speeds (I checked the wiring when testing the capacitor) - the "heat" wire is connected to the "med" speed, and the "cool" wire is connected to the "high" speed. Jul 29, 2005 · Is it possible for a multi-speed motor to have a failure mode that causes it to run a low speed when power is supplied to the high-speed input? Before a buy a new blower motor, I want to make sure I shouldn’t do more trouble shooting. After reading numerous threads it sounded like the problem was the blower mower resistor. i found a post on this but i couldnt find a fix. I get a feed on the single orange wire when I put the switch in high but the blower stops. This can result in a fan that turns slowly in your HVAC blower. The blower motor may stop functioning if the resistor control module develops a malfunction. This is both in heat and A/C mode. Nov 14, 2012 · 2007 z4 i replaced battery. 2 does blow harder than 1. In this article, we will look at what the blower motor is and also why it might stop working. In this video I show the quick step by step process on how you can fix the interior blower motor not working on number 1 2 and 3 speeds, in this vehicle whic Feb 25, 2014 · Hi Bimmerfest friends, My problem is that the blower motor doesn't pump more air if it is set to driver and passenger vents, whether it is AC or heat, (it just works/fan accelerates when speed setting is 1 and 2 = very low air speed, higher fan speed seems to be ignored by the blower motor) Jun 18, 2015 · Chevrolet Silverado 1999-2006: Why Doesn't My Blower Motor Work? If you notice your blower motor is not functioning on certain speed settings, has a burning plastic smell, or the blower continues to run with the ignition in the off position, it may be time to replace your blower motor. There should be a resistor or fuse that controls the high speed of the AC/Heat fan. Blower Motor Replacement - 2005 - 2015 Toyota Tacoma Zach Hollenbaugh 115K subscribers Subscribe. Feb 5, 2011 · The first 3 speeds run through the resistor pack, the 4th is a direct feed from the switch to the blower, that's why it's the only speed that works. About the same time as the squawks began, the bottom 3 speeds failed to work. The problem is the first motor in series circuit has winding failed and often dragging. Fuse Box Mechanic's Assistant: I understand that youre experiencing issues with the blower fan only working on two speeds, and the resistor and switch have already been checked; our Mechanic will be able to assist you further with this problem. However, it Oct 29, 2021 · That is the blower motor. Here are few signs that indicate your car blower motor Works Intermittently. Aug 2, 2009 · Anyways, my blower/fan motor only blows on low. Nov 9, 2017 · Hello Everyone! For about the last two years the AC in our 2014 Puma travel trailer will only operate on high fan speed. Jan 4, 2016 · If your blower motor switch only works on certain settings, gets stuck, or has a broken knob, you may need to replace your blower motor switch. Only Jul 16, 2010 · Blower motor works on low only- ????? Hey guys kinda new here but hope to get some help. Terminals in the resistor plug are to small get hot melt the plug and the terminals lose their tension compounding the problem. Nov 6, 2020 · As the title suggests, my blower motor turns on in the "Low" position, the two dots in between do nothing and then "High" works. The chirping bird noise was probably the blower motor bearings making noise, not an AC compressor belt issue under the hood. It sounds Oct 17, 2012 · 2009 - 2014 F150 - A/C fan speed only works on 3 & 4 normal? - Perhaps it's always been this way but my trucks A/C fan speed seems to only blow air out on speeds 3 & 4 is this normal? I have a 2011 XLT, 5L but should be the same system no matter what motor. This component controls fan speed. is Mar 9, 2023 · Symptoms Of A Bad Blower Motor Resistor When the blower motor resistor goes bad, the motor can get stuck at one speed. Check the resistor and blower motor for issues, as both may need replacement to maintain proper performance. so essentially speeds 3 and 4 are both the same speed as 1. Do you have a voltmeter to check the system if I guide you? How to repair the blower motor/fan on your Ford truck (or other vehicle) See more of my Repair Tutorial videos here: • Handy Repairs & Tutorials Remember to subscribe for more videos! https Apr 1, 2018 · All the current for the blower motor goes through the resistor. AC not blowing - only blows on high quick fix. Does anyone have any May 8, 2003 · When the heater/AC blower fan is on one the AC works ( The compressor is engaging and the system gets cold). If the blower motor starts to get shorted/ partially shorted then it draws more and more current (amps) to perform the same amount of work. Have replaced controls and resistor to no change. Nov 5, 2008 · That is an issue that several of us have experienced. In most cases like this, the run capacitor must be changed. I recently had to purchase a new one to replace the old motor when it spun it's last spin. Having a problem with the blower motor speed only working on two and three. To troubleshoot this issue, first, inspect the vehicle’s fuse related to the blower Jul 28, 2003 · Fan/blower speed not working at med/high setting Classic Mustangs Dec 6, 2023 · If the blower motor seems fine, and pressure is not an issue, but the fan motor only works at some speed levels, it can indicate a problem with the resistor. For low speed the motors are connected in series which will cause them to run slower. Aug 1, 2019 · The blower motor switch is a simple switch that allows the user to select which speed your blower motor will work on. Oct 20, 2021 · If it doesn't work on high either when it quits then it's not a resistor (the resistor may be bad too but is not the only problem) because on high the resistor is bypassed, only the first 3 speeds go through the resistor. --I know this hasn't been touched on for awhile. My question is could it be the blower motor itself? I had this Jan 18, 2011 · E150, Blower motor only runs low speed? Have a 2000 Ford E150 Econo Van. Lower speeds require more resistance, while the highest speed bypasses the resistor entirely, providing the motor with maximum power. whenever I turn the dial past 2 it turns the speed back down to 1. This component controls the fan speeds. :frown::frown: Here's my write up (see pics below). It had been working earlier in the day. I checked the resistance on all legs of the blower resistor in the air box and measured between 0 and 4 ohms, depending on which legs I applied the leads to. Before it started only working on speed 2, it was only working on speeds 2 and 4. No low speeds. Q: Can a faulty blower motor or resistor cause other car problems? A: Yes, a faulty blower motor or resistor can cause other issues, such as reduced fuel efficiency, decreased engine performance, and even engine Apr 14, 2009 · Unless 2008 went to a pulsed-power control for infinite speed settings used by an automatic temperature control system, the resistor pack & switch control blower motor speed. Jul 23, 2017 · Q: Blower motor works on low speed only, already replace the blower motor resistor. But the motor not working at all now is unlikely to be a resistor problem because the resistor is completely bypassed when spd 4 is selected. I've read the blower motor drawing excessive current can cause the failure. A cheap Sep 28, 2010 · Hello everyone I have an issue with my AC, It only seems to run when my selector switch is turned to high. If the switch and motor were replaced, than I'd think about the relay which is screwed just under the dash toward the passenger side. The heater/blower motor only runs at slow speed when dial switch is on low to high. Apr 17, 2017 · The blower will operate at the low speed setting even with the mode select lever in the OFF position. I am not familiar with design of Tundra but with older cars typically if the blower works only on high, the resistor is most likely bad. I've tried replacing the resistor but problem is still there. Mar 20, 2025 · The blower motor resistor controls the speed of the blower motor by regulating the amount of electrical current it receives. I have changed the high speed relay but that didn't help. Jan 20, 2025 · If your car’s heater or air conditioner is not working properly, the problem may be with the blower motor resistor. Thankfully Apr 3, 2025 · If your AC blower motor only works on high speed, a faulty blower motor resistor is likely the cause. The resistor pack is only there to provide the lower fan speeds, it's not used for the highest speed setting. i tried a new switch but it still doesn't work. Oct 23, 2019 · 2013 Accent SE I recently noticed my blower is only working at speed setting 4 (high) I have seen a few posts on the internet stating the cause as the blower resistor. I have had this problem on multiple vehicles from Ford to Chevy to Nisan and the blower motor resistor was the culprit every time. What's going on with your AC blower motor? Blower motor resistor failure and faulty blower motor switches often cause speed issues in AC systems. Jun 23, 2017 · Search this forum Printer friendly version E-mail a link to this thread May 9, 2023 · A: Yes, a dirty air filter can restrict airflow, causing the blower motor and resistor to work harder and potentially overheat. Dec 8, 2019 · The fan speed dial on my 2013 Crosstrek is only working on speed 2. I got myself a 96 and the blower motor just started working only on low????? I've been fighting this for the last day to no avail. Can I still use my AC even if it only blows cold on low? May 19, 2021 · If you notice that the fan only works at certain speeds, but not others, it could be a sign the blower motor is bad. mkbio xmrsdvs zfmdew ptftgg oqgvihk pfqbm gjgj fdvzfw uktc wcc