When the fan slows down and stops, it could. 5CRD LX) in the rec. In a car the ac is actually driven by a belt and pulley which is mounted on the engine shaft. Blower motor problems can cause many driver complaints. Block Diagram for Systems That Use an AC Motor. Just out of the blue, the blower motor quit working. The blower motor suddenly stops working and after few days all works fine and suddenly it will stop running. I thought it was possessed and then the car stalled and had almost no power at all and evenuqtlly (less than a minute) zero volts. Well, before I break down and send my car to the stealership, I thought I would give this one more shot. If you have ever observed the ac at your home,then the blower must be running first and after some time the compressor starts working. 2) The highest speed does not work-it stays the same speed as the 3rd position. It could be from a worn out AC clutch, defected blower motor resistor (located underneath the passenger dash), ECM. The system then automatically restarts the engine when the car is again ready to drive off. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. is my resistor blower motor or switch messed up 6 Answers I have a 01 slt plus and i think my resistor has gone out i get in the car drive and i start to feel air but when i stop it quits putting air out the switch says off and you can still turn on the ac. Blower motor starts and stops Blower motor will go on for a minute and then stop. Front blower periodically stops blowing. 2) The highest speed does not work-it stays the same speed as the 3rd position. Refers to a power-operated feature on a car. car model: 325i I have no air blowing from ac or heater. Check for melting on the blower motor resistor or its plug. Today my car's AC fan wouldn't come on at any speed setting, only to come on later in the day… what could it be? Well, I don't think it's the fuse (otherwise the fan wouldn't come on at all,) it's probably not the blower motor resistor either. When a car heater doesn't blow at all, the problem is either a bad blower motor or something preventing power from getting to the blower. Maybe for minutes, maybe for days or weeks. If your blower motor slows down when accelerating, it may have nothing to do with the motor itself. It's annoying, to many people it sounds like a serious problem, and it's also hard to pin down what exactly causes this problem. Sometimes it doesn't blow at all. It has A/C but is a short body and has no rear heat or A/C. It appears that the fan stops or air is. i would be irate with the dealership if they told me after three times that this is normal. If the blower wheel is out of balance that can take out blower motors, I've seen in as quick as 1 year. Anaheim Automation AC Motors typically have a service life of about 10,000 operating hours, given the motors are operating under proper conditions, and in accordance to the specifications. 2 out of 5 stars 80. Another way of saying this is that it has zero slip under usual operating conditions. Blower motor problems can cause many driver complaints. Finding the location of the fan assembly is a good place to start. It is not possible to repair the blower motor; if it is. The concept is simple enough -- if you. the hoses from the compressor are cool. Block Diagram for Systems That Use an AC Motor. Lifetime of an AC Motor. Home / Problems With Answers / Gas & Electric Furnace Troubleshooting Simplified. you have to believe someone. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely. But if we pull off and wait for 30 minutes or so, the AC will usually start again and work normally. It's running for 2 minutes, turns off for another 2, then turns on again. Fasco D701 5. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC. My car ac works very fine in normal conditions. A/C Front Blower Randomly Stops Working (Starts Working Again After Vehicle Restart) you can't really turn the car on and back off. The blower motor controls on your vehicle are worth maintaining because they allow you to determine how much air is sent through the blower motor and into the cabin. Maybe it is a condenser fan? Running on overdrive??? It just seems very loud to just be operating the AC. Simply open the glove compartment box of your Deville and you'll see the fuse. Today the blower for the htr ac just stopped working. If the blower motor is getting power but the motor still won’t run, replace it. Remove the mounting bolts that hold the a/c assembly and remove the parts one by one until you reach the blower motor. Been diagnosed 3-4 times with two different Ford repair facilities and not able to identify issue cause. Keeping the climate comfortable in your Honda Civic vehicle when it is sweltering hot or frigid outside is a job that the heater and air conditioning accomplish with the help of the blower motor. The torque to drive the motor of your electric fan comes from the magnetic field induced in the motor coils when electricity passes through the coils. A/C compressor continues to cycle on and off when selected, but no fan at any speed. chrysler forum at Car Dealer Forums; Hi I'm re-posting this query because I think you guys in the USA may not. Blower motor won't shut off Blower motor keeps running after car is shut off. 2006 blower motor problems. I can turn the A/C switch off at the thermostat and wait a while (about an hour, then turn it on again and the blower will work again. The AC is cold but the blower isn't pushing any air out. Re: blower fan works for a whilethen quits?? Updated 7:05pm Eastern on 8/7/07 While this is not a good fix you might have someone that does electrical work rig up a power cord to the blower motor (If the motor is good) and plug it in. Blower Motor Control Module 2 Answers. If you've shopped for a new car in the past few years, you've probably seen automakers touting new stop/start systems that can help save a little gas money. Symptoms of a Bad or Failing Blower Motor Relay One of the first symptoms of a bad or failing AC blower motor relay They will be able to determine if the car will need a blower motor. DC Motor only runs. Four different mechanics and dealers have looked at the problem. Homepage › Old Car Air Conditioning › Chevrolet AC Blower Control Problems. Blower Motor Not Working: Find Out How You Can Keep Your Car AC In Top Working Condition. each time to start the car, the climate fan motors make loud noise and stay being noisy. The first time the problem occurred, I thought immediately, it was the blower motor transistor, so I replaced it, as well as the cabin air filter. I push all of - Buick 2002 LeSabre question. Maybe for minutes, maybe for days or weeks. The outdoor AC compressor unit is constantly running but the indoor blower fan keeps stopping. The fan control no longer works. This is the website for EricTheCarGuy! Here you will find answers to your automotive problems. After messing with it for a while it seems to stay on. There is a possibility that the blower motor itself is the root cause. The AC button has a light on the button that illuminates when the air conditioner is turned on. How To: Clean your car's motor How To: Jump start your car battery with jumper cables How To: Fix a plugged up air conditioner drain hose on a Jeep Liberty How To: Use an auto clay bar to clean paint contamination How To: Replace the blower fan motor in a 1998-2004 Dodge Intrepid. There's no whir or hum of the fan motor, no gusts of cold air. It continues to do this until I shut it off. The blower motor suddenly stops working and after few days all works fine and suddenly it will stop running. Now the air handler is making a loud humming/vibration noise when the fan kicks in (the blower motor for the air handler makes the noise, not the gas furnace/exhaust blower). Can I replace a blower motor resistor myself?. My car has been in the shop several times as the blower stops blowing out cold air even though it sounds like the blower is working. com,1999:blog. When the problem was intermittent, you might be able to verify that the blower motor was the problem by removing the cabin air filter and reaching down to see if you can spin the blades and get it to run. Ac/heat blower fan not working, randomly turns on and off with the intermittent running blower. Maybe it is a condenser fan? Running on overdrive??? It just seems very loud to just be operating the AC. I can still hear the fan sound loud and clear but air flow decreases a lot even at full speed of blower. a furnace that turns on and off too frequently is a huge energy hog, just like turning on and off your car too often. Why not believe the dealer? tell them you want a refund if the problem persists. (Common Problem-- '99 to 04 Cherokee) In the Cherokees with ATC ( some call it: AZC - Auto Zone Control) The PROBLEM IS THIS: With the ATC System -- The CONNECTOR on the Blower Motor Control Module-- OVERHEATS Resulting in Intermittent OR NO Operation of the Blower Motor!. The EGDE air conditioning is not even adequate to keep you comfortable on a 70 degree day much less when the temperature rises past 90 degrees. Heater Blower Motor Resistor. Ask Question the blower motor in the furnace housing. 2008 Honda Pilot AC works at first then starts blowing softer and softer until not hardly blowing at all. 2011 Volkswagen GTI. Re: blower fan works for a whilethen quits?? Updated 7:05pm Eastern on 8/7/07 While this is not a good fix you might have someone that does electrical work rig up a power cord to the blower motor (If the motor is good) and plug it in. There's no whir or hum of the fan motor, no gusts of cold air. thanks for any input on this problem of no air blowing out of the vents. Blower Motor Failure. Depending upon selected blower speeds, ground is either supplied directly to the blower motor or voltage is varied by a series of in-line resistors on the ground side of the circuit. Automotive Blower Motor. If none of the fan speeds work, then checking the fuse or fuses for. Sometimes it doesn't blow at all. The system then automatically restarts the engine when the car is again ready to drive off. It would run non-stop but you would have some AC until the heat wave tames and you can get things fixed up. It is not possible to repair the blower motor; if it is. (The black wire is usually the negative. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. [ 2 Answers ] We have ~ 1991 Carrier 58sx high efficiency condensing furnace and central AC. The blower motor for the heater system is not working correctly. 5 to 3 hours depending on unit location and part availability. Common Problems With Your Car's Heating and Cooling and just over and off to the left you will see the blower motor resistor. If the fuses,relay,resistor and blower motor checks out okay like you said, i start by checking the blower switch and work my way towards the motor. Was this a sign of it going out? A If the blower motor is no longer working on any speed, we have two main. I then replaced the motor and reluctantly decided (because of not being able to return electrical parts) to replace the blower motor resistor. If the car is running or the key in the accessory position (warning lights on, but engine not running) and the blower switch is in the off position the blower fan will stop. Old car air conditioning can be difficult to fix. Is your fan speed control a variable speed or does it have individual set speeds that can be selected for example, Off, 1, 2, 3, and so on?. Homepage › Old Car Air Conditioning › Chevrolet AC Blower Control Problems. Fasco D701 5. January 17, 2016 - The fan switch may be at fault, but a more likely reason is that a blower motor resistor that controls the voltage going to the blower has packed it in. Discuss Front Blower Problem on a Chrysler Town & Country (2. driving while it is hot outside, the blower works fine and then maybe after 5 minutes of driving the blower slowly stops working until it dies. the air conditioning on. When a car heater doesn't blow at all, the problem is either a bad blower motor or something preventing power from getting to the blower. Your car's blower motor is not only necessary for the operation of your air conditioner. Removing the A/C blower is only a matter of removing three screws and a plug. They think it may be the blower motor ($285) and. AC Blower Speed Slows Down On its Own When Set to High and Running Car for A While. Heater Blower Motor Resistor. Blower motor has nothing to do with the A/C. Previous 1 2 3 4 5 6 7 8 9 325 Next All Page: Next All Page:. May not turn on when vehicle started or stop while vehicle has been running, nothing specific to recreate issue. Homepage › Old Car Air Conditioning › Chevrolet AC Blower Control Problems. Once I accelerate or if a slight positive incline puts a load on the engine, the two side vents seem to not be affected, however air volume from the two central vents is greatly diminished, nearly to no air. All of our products exceed OE design and allow your heat and air conditioning to run at top-notch quality again. Check out free battery charging and engine diagnostic testing while you are in store. 2006 blower motor problems. How To: Clean your car's motor How To: Jump start your car battery with jumper cables How To: Fix a plugged up air conditioner drain hose on a Jeep Liberty How To: Use an auto clay bar to clean paint contamination How To: Replace the blower fan motor in a 1998-2004 Dodge Intrepid. One motor is used to move a door that switches airflow "modes," like. I've also been thinking about the heat sink idea (a little tricky because all the resistors are bare metal carrying power) but I think the overheating is a symptom and not the underlying problem(bad blower? or restricted airflow over the resistor block??). A blown out fuse impedes the operation of the blower motor and the fan. Can I replace a blower motor resistor myself?. When you switch on. But when I drive it for awhile longer, and often at high speed, it stops cooling. Then at this point the evaporator coils tend to freeze (sometimes). 1) AC works perfectly fine in the beginning. a furnace that turns on and off too frequently is a huge energy hog, just like turning on and off your car too often. I just wanted to post this because I was having some issues with my air conditioning on my 2007 Fusion. Toyota Camry 2007-2011: How to Replace A/C Blower. If the blower motor is getting power, it's probably a bad blower. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. Blower motor problems can cause many driver complaints. So apparently the compressor is working. Block Diagram for Systems That Use an AC Motor. You can attribute air conditioner rattling to one of several components. Basically, air conditioning systems operate on the principles of evaporation and condensation. The dealer found that there were melted wires that caused the blower motor to fail. start at the blower motor. He was concerned about the long-term effect on a car's engine, and, frankly, just didn't like it. If the fans are not spinning at their proper speed and thus not keeping the car cool enough then this could be the culprit to the overheating issue. Other posters have reported that the blower motor has failed. The blower motor for the heater system is not working correctly. When a blower motor starts to go bad, it can draw more power than the resistor is rated for and cause it to fail. Average repair cost is $330 at 68,550 miles. Start stop has been around for over a decade and I haven't heard of any wide spread failures. This article series describes in detail the testing and diagnosis of problems with air conditioning fans and with forced warm air heating blower fans found in the air handler or AHU. Next time the blower wont work you can try giving the motor a whack with a hammer. In fact, I haven't hear of any car (SS or not) that has had a starter motor failure post 2000. Motor may be going out. It is not possible to repair the blower motor; if it is. This isn't necessarily a common symptom, but it's possible. Today - as i stood with the car somewhere and let the engine run (idled) - i noticed strange noises from the front: The AC - compressor runs and stops after maybe 1 - 2 seconds. A Car Pro Show radio show caller wanted to know if he could purchase a car these days without start/stop technology. But if your car's heater suddenly stops working in the middle of winter, it can make it downright miserable. workaroud: has to turn off climate and turn-on again climate, then the motor noise goes away. The second problem SOUNDS like-- The Infamous Blower Motor problem. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter. My air conditioner / fan stops blowing and then starts up after a moment or so, but the truck seems to be running fine, - Answered by a verified Chevy Mechanic. One important note before I get into this article: Be sure to check your local laws before working on your AC system if that's what you intend to do. I have tried replacing the FSU with a new one and it does the same thing. The AC would cut in and out several times per day for about 3-4 days. Sounds like the front blower motor is starting to fail. Problem 1 - The Air Conditioner Blower Won't Start. There are many things that can cause a compressor to stop working. Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by zephead, Sep 4, 2015. I took photos of my diagnosis. My blower motor does come on. If the blower motor is getting power, it's probably a bad blower. 1) the problem occurs regardless of any settings. Re: blower fan works for a whilethen quits?? Updated 7:05pm Eastern on 8/7/07 While this is not a good fix you might have someone that does electrical work rig up a power cord to the blower motor (If the motor is good) and plug it in. Verify if this light turns on when you reach MAX A/C. Is the SRU port’s ability to apply vacuum when motor is not on for the “REST” feature it only function? I will put car AC. When I turn the the key and pull it from the ignition switch, the fan stays off for 2 or 3 seconds, I hear an audible "click" and the blower fan starts at low speed again. But the next day when I drove it for an hour I noticed that after about 20-30 mins of driving the car, air, cold or otherwise, stopped coming through the vents. First, check the fan blades. the air conditioning on. Anything from no air circulation to annoying or noisy operation. SLT CC w/ 5. i would proceed to goto the showroom, ask to test drive a new fusion, then get in one, and turn the blower on and when it doesnt make that noise, pull that fusion into the service bay and say, now, THIS ONE doesnt squeak, fix my fucking car. i would be irate with the dealership if they told me after three times that this is normal. If you've shopped for a new car in the past few years, you've probably seen automakers touting new stop/start systems that can help save a little gas money. If you turn on your air conditioning system and find that there is no air blowing out of the AC unit, or no buzz of the blower fan motor, then it is possible the AC blower motor has an issue. You'll find your car's blower motor located in one of two places. It doesn’t happen a lot, but blower motors can stop working for some reason and cause the furnace to overheat. It does not take much to put one out of balance, and sometimes it is a wrestling match getting the wheel of a old motor. Your car's blower motor is not only necessary for the operation of your air conditioner. Start by checking the coolant level when the engine is totally cold, and fill it if it's low. Advance Auto carries over 2,391 aftermarket parts for your 1995 Ford E-150 Eco. If the system is in "Auto" the blower will not start until the engine warms up. The outdoor AC compressor unit is constantly running but the indoor blower fan keeps stopping. Sometimes it blows cold air but then, within about a minute or so, it gradually stops blowing. DC Motor only runs. The temperature in my house is 79F. I keep a spare motor and resistor pack around just in case but have not had another issue. The stop comes earlier if it runs with max AC. Step 3: Access the blower motor from the interior of the car, on the passenger side. If they don't appear to be damaged, the blower motor itself may need to be replaced. Re: blower motor keeps running whether car is on or off Post by mrbrian200 » 19 Nov 2017, 19:37 I'm not expressly familiar with the inner workings of the electrical portion of the ignition switch, however, when I first bought my S60 after it had been basically sitting for the better part of six months I noticed something in the ignition switch. Been diagnosed 3-4 times with two different Ford repair facilities and not able to identify issue cause. The blower would work at the various speeds but it would blow warm/hot air (probably just because it was hot in the car). Blower/Air Handler motor noise. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. Maybe for minutes, maybe for days or weeks. Next time the blower wont work you can try giving the motor a whack with a hammer. Here's how you can diagnose if this component. Blower motor ; F9 = 15A, Air conditioner, Heated washer jets [JimLev says it handles the heated washer jets and the Check Control Module panel] F20 = 7. Step 2: Locate the blower motor. Sell on Amazon Start a Selling. Just out of the blue, the blower motor quit working. When a car heater doesn't blow at all, the problem is either a bad blower motor or something preventing power from getting to the blower. I kept hoping the fan would shut off but to no avail. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay. 5 seonds and I will try connecting the motor to a car battery tonight just to. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Hi, I’ve got a 2003 Mazda 6i with the manual air conditioner (if it matters). Hi Kevin! I do not know what could be your problem if it is not covered in the post I wrote on "Why does my air conditioner fan motor keep burning up". Most likely is the blower motor. Just out of the blue, the blower motor quit working. Fan blower continues to run after engine shutdown Made a short trip today and returned the car to my garage but noted fan motor/blower continued to run even 60 minutues after engine shutdown. I am driving and the AC blower is working fine, I turn my car off for like 5-10 minutes to go drop the mail and when I come back and turn the car on, the AC blower just won't start again. Are you facing issues with the blower motor in your car? From frustrating or even noisy operation to no circulation of air, blower motor not working in your car can be an annoying issue. If I dare put the climate control thing back to life -> blower motor goes full blast and cannot be stopped unless I turn off the vehicle. Motor has 2 speeds hooked up and is very noisy on high speed. i would proceed to goto the showroom, ask to test drive a new fusion, then get in one, and turn the blower on and when it doesnt make that noise, pull that fusion into the service bay and say, now, THIS ONE doesnt squeak, fix my fucking car. I kept hoping the fan would shut off but to no avail. I have been having an intermittent blower motr issue for the past 4-5 months. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time. There are no causative events, it just stopped working. Blower Motor Control Module 2 Answers. Outside causes include the blower motor resistor, fan relay, and climate control switches. Learn about what can cause your car to make unusual noises, and find out ways to diagnose and solve the issue. A synchronous electric motor is an AC motor distinguished by a rotor spinning with coils passing magnets at the same rate as the AC and resulting in a magnetic field that drives it. Why Does my Car Air Conditioner Squeal? July 22, 2016. Start/Stop technology has been around in the world of super-efficient hybrids for quite some time now, but this is fresh technology. Then the air stops blowing. I have about 30,000 miles now and summer is just hitting and it's acting up. Not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. How to Diagnose a Non Working Air Conditioning in a Car. The EGDE air conditioning is not even adequate to keep you comfortable on a 70 degree day much less when the temperature rises past 90 degrees. One motor is used to move a door that switches airflow "modes," like. We have a brand new BMW X3. I cheched under the hood and found that the air conditioning was on and that the hose and dryer were completely ice up. The most common causes of broken air conditioning are leaks or compressor issues. I am driving and the AC blower is working fine, I turn my car off for like 5-10 minutes to go drop the mail and when I come back and turn the car on, the AC blower just won't start again. When a car heater doesn't blow at all, the problem is either a bad blower motor or something preventing power from getting to the blower. Automotive Blower Motor. Next time the blower wont work you can try giving the motor a whack with a hammer. If the blades don't spin freely, replace the blower motor. Anaheim Automation AC Motors typically have a service life of about 10,000 operating hours, given the motors are operating under proper conditions, and in accordance to the specifications. blower motor makes sense. Power is provided to the auxiliary blower motor from the rear fuse block. Location and how to instructions on the Blower Motor Control Module For those Denali/GMC owerners that are curious if your front ac blower stops working or runs at low speed. bmw series 5 blower fan location 90 bmw 525i blower fan resitor 2012 535 xi blower fan not working 2006 325i fan blower issues blower fan only works on high how do you get to the blower fan e39 more blower fan trouble ac blower fan location ac & heat. got my car back last friday turned out to be the. It seems that once it gets hot outside, say over 90 degrees or so, and the car is sitting in the Texas sun the blower motor won't kick in. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. If the motor won't work on high, then it's probably the motor. My central AC unit decided to stop on the hottest day of the year. It reviews best practices for diagnosing common electrical problems. Inside it is not getting cold. Start/Stop Technology in the Ford F150 Should Be Embraced. It should come ON when you turn on the blower switch. Are you facing issues with the blower motor in your car? From frustrating or even noisy operation to no circulation of air, blower motor not working in your car can be an annoying issue. 2 out of 5 stars 80. Air Conditioning Blower Motor Repair Labor time - Troubleshooting and repair of the air conditioner system time (approximate) 1. For instance, power windows and power locks would be considered accessories. 1987 - 1996 F150 & Larger F-Series Trucks - A/C Air stops blowing when accel. Discuss Front Blower Problem on a Chrysler Town & Country (2. Rear blower works fine. No clicking sound and no sound from the engine can indicate a bad ignition switch. If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won't shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged. The blower motor controls on your vehicle are worth maintaining because they allow you to determine how much air is sent through the blower motor and into the cabin. ALL THE PARTS YOUR CAR WILL EVER NEED Heat & Air Conditioning Repair Manual FORD > 2005 > FREESTYLE > 3. My blower for the heater doesn't seem to blow very hard even on high. It has A/C but is a short body and has no rear heat or A/C. The most obvious problem that you can have with your air conditioner blower is when you flip the switch to the air conditioner unit and nothing happens. I have a new blower motor, interior fan switch, resistor, and AC components. 2011 Volkswagen GTI. Hi, I am not a mechanic so forgive my ignorance. If the fuses,relay,resistor and blower motor checks out okay like you said, i start by checking the blower switch and work my way towards the motor. Brrr! It's cold in here! A chilly passenger compartment is not always a sign of a faulty heater core. You can attribute air conditioner rattling to one of several components. He was concerned about the long-term effect on a car's engine, and, frankly, just didn't like it. The most obvious problem that you can have with your air conditioner blower is when you flip the switch to the air conditioner unit and nothing happens. A 'Start stop system' or stop-start system is also known as the Micro-Hybrid system. 50 part at radio shack and replaced the bad thermal fuse but positioned it a little further away from the resistors. a furnace that turns on and off too frequently is a huge energy hog, just like turning on and off your car too often. Furnaces also run on combustable gas, whether that is natural gas or propane. 1987 - 1996 F150 & Larger F-Series Trucks - A/C Air stops blowing when accel. If the blower motor, resistor, or plug need to be replaced, O'Reilly Auto Parts has the parts you need. amp probe on the blower. Are you facing issues with the blower motor in your car? From frustrating or even noisy operation to no circulation of air, blower motor not working in your car can be an annoying issue. What is wrong? Archives. A furnace blower motor that stops pushing warm air out is not the same as a blower that is forcing only cold air into your home. Front blower periodically stops blowing. Once I accelerate or if a slight positive incline puts a load on the engine, the two side vents seem to not be affected, however air volume from the two central vents is greatly diminished, nearly to no air. The blower motor starts, turning fan blades that circulate cold air from the evaporator coils, through the home's ductwork and into each room. If the blower motor is getting power, it's probably a bad blower. Humming noises can indicate the starting capacitor is starting to fail or a bad motor. (side question: what is this fan called? is it the AC fan? The blower motor fan??) The story: So, one day, it just stopped working. I guess this is the blower motor that needs replacing and I've seen the. Without a functioning blower motor your engine runs the risk of overheating. Refers to a power-operated feature on a car. With my limited electrical experience i used a volt meter and on days the blower worked the power to the connector that plugs into the blower had power varying as I adjusted the fan speed knob and on days it did not. How to Diagnose a Non Working Air Conditioning in a Car. All of our products exceed OE design and allow your heat and air conditioning to run at top-notch quality again. it starts to blow a tiny bit but then stops again. Help! AC stops working after 20 min. good with a electric DC Volt meter for a fuse box check or blower motor fan "plug going into the blower fan motor" electrical test. The blower would work at the various speeds but it would blow warm/hot air (probably just because it was hot in the car). The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. Blower fan intermittent; changes fan speeds on its own : Sometimes when I start the car it turns on, and sometimes it doesn't work at all. Rich, not related. Required Tools for this Project.