Ac Blower Fan Starts Then Stops

air conditioner compressor fan not working Portland OR 97296 Home » Oregon » Portland » Air Conditioner Compressor Fan Not Working Portland Or 97296 Portland Multnomah Heating/Cooling Problems. the blower motor can be easily removed after removing the blower fan wheel). I shut it off and leave it off for a while but continue driving and then it starts working again for a brief time. They always mount the interior fan near the evaporator and heater cores. I set house to 80, when it was at 74, and it ran w/o shutting off. When the control board initiates the blower, the run capacitor closes the circuit to begin moving the blower fan. then took the blower fan out and clean it as well. AC blows cold, then hot, then cold Blazer Car Forums and switched the blower to floor then back to vent and could see the vacuum device working when I turned. When it stops working, it does not work on any fan speed. If I stop a second time, it may or may not start up again. ? The fan starts, runs for about 5 seconds, shuts off, stops and then repeats this process over and over. The Air conditioner outdoor unit will not come on. Re: Goodman Furnace Blower making excessive noise It depends on what about the furnace unit is making the noise. First time this happened the a/c compressor would engage and disengage, but still no air from the blower. CAS, Okay and thanks for your help. Normal ACs (non inverter) work in the following way * The AC compressor runs continuously till set temperature is reached in the room * The compressor then switches off, but the blower fan in the wall mounter unit keeps running. The blower fan in my AC ( or heater) does not blow. If you see or hear the fan turn on, your blower motor is not the culprit. air conditioner compressor fan not working Portland OR 97296 Home » Oregon » Portland » Air Conditioner Compressor Fan Not Working Portland Or 97296 Portland Multnomah Heating/Cooling Problems. The blower will then run until the firebox is cooled. Here is what Im doing with mine 2003 Dakota. In the case of air conditioners, capacitors are used to kick-start the compressor, the outdoor fan motor, and the blower fan (indoor unit fan). This is one of the most common and easy ways to know if your air conditioner blower motor is broken or not. I shut off the AC then put the blower on max and noticed it slow to a complete stop. If the blower motor is readily accessible and removeable (some are, some not nearly), if you dismount it and (with power to unit off of course) turn the fan by hand, if it drags or has significant or variable resistance to turning or makes any sort of dragging or scratching sound, then the problem is almost certainly motor bearings or debris in. 4440 cab blower stops discussion in the My 4440 heater/air cab blower motor will run about 3 seconds and then shut off. Covers AC that isn't working at all, isn't cooling properly, isn't blowing air, is leaking, and similar AC problems. A fan will use a run capacitor when the fan is running to help it run more efficiently. Need to know what the amps are of the blower motor, if you have a multimeter to put around the fan motor wire. Is your AC not working? If your central air conditioner is not cooling right, repair it with these expert DIY air conditioning repair techniques. Is the fan on the outside unit blowing out hot air? If the blower isn't running but the fan outside is, the problem could be the blower motor, it's run capacitor, or the furnace/air handler control board. 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. I connected the fan to 12v & it comes on. A/C system can be turned off and on multiple times, but the front blower fails to respond. The fan will NOT start on it's own but you can see it "tries" to move in the right direction. the same issue with mine the fan inside does not turn off when I turn the AC off at Thermostat or when the desired Temp is reached. When it does turn on it runs great and cold. 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. 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. When a Car Fan Won't Blow. UPC (638104003575) Review (mpn:acdf4 for sale) Acdf4 Active -line Brackets Hydroponic Hydrofarm Fan Cfm 4/1 65 Air. And once it thaws it will work for 20-30 mins then freeze up again. Therefore, it's essential to keep it in good condition if you want your air conditioner to work. No matter how many times (or position) the fan speed knob is moved, the front blower motor fails to respond. Look and listen for the compressor clutch engaging on the AC pulley. The outdoor AC compressor unit is constantly running but the indoor blower fan keeps stopping. it may cause the blower motor to remain stuck on one fan speed. When I put the fan on manual (or auto) I notice that the dashboard lighting and the 2 two light indicatiors for REC and A/C tend to go dim then the 2 indicators start flashing. However, they work together as a team. My blower fan stop woking. 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. the compressor is warm to - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. The outdoor AC compressor unit is constantly running but the indoor blower fan keeps stopping. 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. If it's on 4, it will feel like it's blowing less then if it was on 1 right when I started it up. Brian - I have a similar problem if you wouldn't mind helping. A new problem started yesterday(97 B4 sedan). Is your AC not working? If your central air conditioner is not cooling right, repair it with these expert DIY air conditioning repair techniques. I told him that the air conditioning system was not running well, and that this was the sign. Then after about 3 - 4 seconds it starts running again. or just driving along and hit a bump and it starts working again. This should start the blower right away. When running the fan the indicator shows "on" but no air blows from the vents! Then it will come back on! It makes a "clicking" sound when the fan is running kinda like something stuck in the blades. blower fan not working The problem stated when I was driving with the AC on and all was well, suddenly the fan just stopped. If there is a lot of soot/condensate built up, you may be able to clean it up enough to get it working again. com for best pricing. The Auto feature trys to adjust the blower fan speed to the proper speed but nothing happens Basically everything works but the blower. Then my engine blew up so, as I said, bottom of the. Took me longer to walk to the shed to get the socket set. AC Blower Speed Slows Down On its Own When Set to High and Running Car for A While. When I started the car in the morning the fan would not run but if I slammed the passanger door then it would kick on and start running (Or hit a bump like you said). Again, before you can answer the question "why is my air conditioner so loud," always start by figuring out where the sound is coming from - you can't diagnose a problem if you don't know where the problem is to begin with! Once you have localized the problem, another way of diagnosing it is to listen to the sound it is making. Here is what Im doing with mine 2003 Dakota. A capacitor stores up energy that provides power to your air conditioner's fans. DIAGNOSE – A/C SYSTEM DOESN’T BLOW COLD AIR. They always mount the interior fan near the evaporator and heater cores. and see if the fan starts working. Multi-Speed Blower vs Variable Speed – What’s the Difference? Two popular choices of furnace blowers on the market today include the multi-speed blower and the variable speed blower. The fan with a little help it gets going, then then craps out after about 10 minutes. At this point, I have a new condenser, and a new capacitor installed, but I cannot figure out why the condenser fan stops running within 5 minutes of turning the AC on. If the temperature in your home is higher than the thermostat is set to and the thermostat is on AC mode, then check for these problems in. ON/OFF Or any other try won't start it again. I will go to my local HVAC supplier and get the part. The thermostat is what tells these separate systems to work together. Ways to Help Maintain Your Air Conditioner's Fans. Turning the system off for a while and letting it thaw will temporarily solve the problem. Capacitor problems. Start Right Here Find appliance parts, lawn & garden equipment parts, heating & cooling parts and more from the top brands in the industry here. If the indoor fan stops, you’ll find that there is no air blowing through the vents. It may be the plenum or metal (or other) box that the air blows through to get to the ductwork. Excess air and moisture in the system may lead components to freeze (literally). Done with work,turned fan on-nothing,any speed. Most of the air conditioning systems that use belts are outdated units. There is a blower resistor (common failure) next to it. Either the outdoor fan does not run, the compressor does not run, or both the fan and the compressor do not run. I finally got around to working on it a week ago. You should hear the motor working around the passenger glove box floor area. It goes back and forth. My Ac unit when switched on after a while the out door unit picks and it start cooling, after a while it drops, the out door fan stops spinning and later it starts again, it can happen as long as the ac is on, it works and drops, works and drops, pls whats is the cause of these problem. You have to cut it off for a while. Today, I get in, starts, works, then dies. I took the fuse for the 'Blower' out and the problem stopped but I am unsure of the next. Sometimes cycling the AC control to Off and then back to MAX will make it start working. When the fan stops completely, it is almost always the fan. When it is cold in the morning it works fine. I eventually removed the fuse (#25) to stop it and it worked, but now I obviously have no A/C or defog etc. I work out of my car, and am driving in the city for about 4 hours a day. Periodically, stop and rotate the fan a 1/4 turn between your knees and repeat the process. The Raleigh, NC air conditioning repair professionals at Raleigh Heating & Air have years of experience working with all different kinds of air conditioning problems. Turn fan handler off the disconnect, next to the unit, then turn on and read the lights on the board. I then turned the Fan Cycle Control/Limit Control dial and after turning about 45 or 60 degrees in rotation the fan did turn off. If the blower is running but the fan on the outside unit is not, then continue your air conditioner troubleshooting at the outside unit. outside unit continues to run until we manually turn it off at the thermostat. The best setting for diagnosis is "fresh air" (not recirculated) with the air blowing out of the center vents in the dash and the AC turned on. I went up on top while the fan was in it's continuous run mode. Check for power at the motor itself. Where there is a thermostatic switch in. Hello, I have a 2006 Jetta TDI with about 140,000 miles, and a very peculiar problem- My air conditioning stops working on long highway trips. It would not run in any setting, low or high. If it starts again, I'll just replace the fan. on my car that wire is a weak connection. A motor capacitor, such as a start capacitor or run capacitor (including a dual run capacitor) is an electrical capacitor that alters the current to one or more windings of a single phase AC induction motor to create a rotating magnetic field. Kicking the glove box confirms it. If the blower does run when you move the fan switch to ‘manual’ or ‘on’, then the problem most likely is a faulty temperature switch. Ok, found a local place that gave me a discount on the Condenser fan motor. These systems use external orange and white wires. Who knows, maybe the broken part is covered by it. 6 If these simple steps don’t work, have a heat pump repair technician check out your system. Blower , a mechanical fan is an electrically powered device used to produce an air flow for the purpose of creating ventilation, exhausting out the gases from process equipment and environment. Mine, which was bad read open, so it was easy for me (don't forget my fan worked at full speed). It keeps on running in my car. The thermostat is what tells these separate systems to work together. No one wants to have furnace problems during winter. This group of input objects is related to electric power serving the facility. I have a York Diamond 80 from around 1999. Went back about 30 minuets later and tried it and everything seemed to work fine. Air conditioner blows warm air inside the house Condenser fan motor – The condenser fan motor turns the fan in the outdoor unit. I then turned the Fan Cycle Control/Limit Control dial and after turning about 45 or 60 degrees in rotation the fan did turn off. Repair common AC blower control module problems. My fan indicator shows the fan working at the proper speed, but no air is coming out. Central heater furnace starts and blower starts for 30 minutes and then fan shuts off [ 1 Answers ] We start our central heater and the furnace kicks in and then the blower starts and the house warms up but when it reaches the desired temperature. It may be easier to see with the glove box removed/lowered downbe gentle with it, the hinge may break. The only way I can stop the fan is if I turn the vehicle off, then press OFF then restart the vehicle. Re: Front AC Blower Problem To reprogram the HVAC module, remove fuse for a minute or so or disconnect the battery. on my car that wire is a weak connection. Sometimes when I start the car it turns on, and sometimes it doesn't work at all. More importantly, it could be the sign of a major HVAC problem that requires repair. Service Champions is the Northern California air conditioning company for homeowners who want industry leading technicians and a 100% money-back guarantee. Sometimes it does not turn on at all. I checked the plug wiring and it was ok so that led me to the resistor pack itself. If it works there you may have an issue with the blower resistor itself. 6 If these simple steps don't work, have a heat pump repair technician check out your system. If you do not hear the fan, then you may have a bad resistor, blown fuse, or a loose wire. All the time. My car does this now. then took the blower fan out and clean it as well. However, your capacitor can go bad for various reasons and stop working properly, which will force one of your system's fans to stop spinning. The fan in my range rover was blowing constantly, it started randomly and it would not turn off. Sometimes when I start the car it turns on, and sometimes it doesn't work at all. The outside unit still continues to run but the blower motor stops. The ac blower motor is usually located in the AC duct housing or heater case assembly. Blower Will Not Shut Off. Checked the fuses, relay and even tried a new fan motor. Some of the things that can cause blower motor not to work include: Blower motor, blower motor wiring, connectors, relay, fuse, switch/control panel, blower motor resistor, blower motor module and Ignition switch. I recently started having trouble with my ac not working right. • Set thermostat to warm temperature and furnace blower should come on after 15-30 seconds. As the air conditioning system cools down, the blower fan pulls the warm air from inside of your home, runs it through the air conditioning system, and then blows the now cool air back out into your home. 2) The highest speed does not work-it stays the same speed as the 3rd position. 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. The blower wheel and housing will also squeal when they malfunction. I have checked the power to the fan and get 12 volts with the switch off or on. If the blower does run when you move the fan switch to ‘manual’ or ‘on’, then the problem most likely is a faulty temperature switch. How To: Troubleshoot a heater blower Replace the blower fan My 2006 Chevy Equinox Blower HVAC Blower works then stops for days , then suddenly Starts up again. If I switch the a/c on and off at about 10 minute intervals, the fan will continue to blow on high - even on 11 to 12 hour long trips. Consider removing other appliances from the power outlet and moving them to another power supply so that the air conditioner is the only appliance on the circuit. Outdoor unit gets really hot! Answer: This problem could be caused by a bad motor run capacitor or a bad fan motor. You can remove the fan from the motor shaft and clean it with hot soapy water. The blower motor would not work at all but all of a sudden it would come on and run for a few days then quit again. Rear A/C controls continue to work fine and cold air is blowing out well. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely. on my car that wire is a weak connection. I had to have the blower motor replaced I think they said it had a dead spot in the motor or something I cannot remember. when it happens i just wiggle the wire and the blower starts working again. On my wifes car (03 DTS) when you turn on the car you can hear like a clicking or a knocking noise coming from the dash does this for about 10 seconds and then it goes away. You see, large appliance motors require up to 5 or 6 times more energy at startup than they require when running continuously. The time differential can vary slightly based on the temperature, voltage, and types of control circuit. My blower fan stop woking. Air conditioner starts then stops after only a dirty or stoped up outside condenser unit coils / over charged / wrong refrigerant/ bad outside condenser fan motor or blade/ no water flow or. As the air conditioning system cools down, the blower fan pulls the warm air from inside of your home, runs it through the air conditioning system, and then blows the now cool air back out into your home. Thermostat is set to 74F. Could the new module and blower be faulty. The fan motor will NOT run backwards at start with a reverse assist. But the Compressor goes off when needed. Depending on the year, make, and model you may find this component both in the interior cabin area or outside in the engine compartment side of the firewall. I shut off the AC then put the blower on max and noticed it slow to a complete stop. In the high position, the resistor pack is bypassed, the resistor pack just reduces the voltage so the fan will operate at lower speeds. Verify continuity of windings (motor leads to unpainted motor end plate). On long drives after a few hours driving ( sometimes less) the blower is clearly blowing loudly audible underneath the right side near glove box, Fan is on full, but no cold air is coming thru the vents except for a very small dispersion of air. Then, the blower motor seems to try to run every 10 minutes or so. The fan control no longer works. Then - Maybe if the system was in auto cool and the interior temperature was below the set temperature of the thermostat. I have a York Diamond 80 from around 1999. The air conditioner blower is basically the fan inside of an air conditioning unit that blows air through a cooling coil, which transforms the air into an arctic blast refreshing your home on hot summer days. It will do this anywhere from 30 seconds to one minute. Since your fan starts and runs in manual FAN ON mode I suspect the limit switch. When the fan in a car stops working on any speed but hi, the blower resistor (in. We've listed the parts associated with solving a furnace that starts then stops below. When I switch my AC on,it takes few minute then the outer unit start working( both the fan and the motor). If your air conditioner fan is not spinning, the problem could be a faulty belt. I find it strange it runs fine until you stop and then doesn't work. 98 SLS After using my A/C, I shut off the car and the fan keeps blowing. They always mount the interior fan near the evaporator and heater cores. Tried it again and the same. It's running for 2 minutes, turns off for another 2, then turns on again. Motor start but it ramps up and down about 5 times and then quits spinning. When the AC gets the house to desired temperature, the outdoor compressor will shut down, but the house blower continues to run. It draws so much electricity, it will eventually burn out the resistor. The Air conditioner outdoor unit will not come on. When a car is cold, the fan belt will squeal if it is loose. 2) The air is constantly cold and what little air that comes out of the vents after it stops blowing is still very cold. If your AC fan or compressor is slow to start, doesn't blow any air, blows weakly, blows only warm air, stops after a while, dims your lights, or trips your breaker, you should first check your capacitors and replace them if needed. When it does turn on it runs great and cold. Overall, I love my fusion! UPDATE- I first lubed the upper part of the fan near the blade cyclinder with silicone spray; but the squeaking came back. Some air handling units have belt-driven motors, and most have capacitors for the air handler electric motor, and typically, they only required HVAC maintenance on the blower is oiling the air handler blower motor if it has oil ports or checking the belt if you have a belt-driven motor. Hi, I would first make sure the blower motor is working. If you're hearing noises behind the dash when the fan is off, that's the blend door getting stuck trying to change positions. Undersized Air Conditioner for the room. If conderser coil is clean, then you will need a new fan motor, as it is just worn out. I connected the fan to 12v & it comes on. Outdoor unit gets really hot! Answer: This problem could be caused by a bad motor run capacitor or a bad fan motor. When your furnace isn’t actually heating, though, your furnace blower shouldn’t be running at all. It will do this anywhere from 30 seconds to one minute. CAS, Okay and thanks for your help. later both start working again. Sometimes it can be a contactor problem. Blower Will Not Shut Off. A few months ago the Heater/AC began acting up. (blower fan doesn't run). most parts stores/ online dealers call it a blower motor most blower motors run $50-110 cdn I'm not sure the exact prices, just call your local parts store they can quote over the phone. A fan will use a run capacitor when the fan is running to help it run more efficiently. The problem is that a significant portion of the cooling in your attic will be provided by your air conditioner. June 5, sony wasn't looking forward to making that trip without an AC fan. It seems like whenever my AC gets close to shutting off from the thermostat hitting the correct temperature, the AC fan will begin to very briefly cycle off and then. The fan control no longer works. Then turn off the car. A/C Blower stops and starts - 2001 Dodge Ram 1500. about the blower in the furnace or the fan in the tagged hvac air-conditioning fans central-air testing. The 2006 Chevrolet Silverado has 18 problems reported for blower fan stops working sometimes. ON/OFF Or any other try won't start it again. I have a few questions: #1) Is the blower regulator the problem? #2) Can I replace it easily myself if I buy one on-line?. I have a 2005 TR4 and for the last two weeks my AC will stop blowing air for a day or so and then it start working again. The tube is placed over a window, so you can see the dripping water to know that there is a problem. Then pull back and forth on the strip just as a shoe shine boy would polishing a pair of shoes with a cloth. Place the 1/2 inch wide strip on the corroded copper, one end of the 1/2 inch wide strip in each hand. It will do this anywhere from 30 seconds to one minute. The outside unit is turning on and the fan inside starts to push the air through the vents. the blower motor can be easily removed after removing the blower fan wheel). I borrow my sisters prius to swap out some parts like the ac control mudule, blower motor contol, & some relays. When your AC, heater or fan is on, you notice a squealing noise coming from your inside. Keeping the black lead on a good ground, usually a bolt on the engine block, and the blower switch turned on, use the red lead to probe the plug that usually attaches to the blower motor. If I stop a second time, it may or may not start up again. Then pull back and forth on the strip just as a shoe shine boy would polishing a pair of shoes with a cloth. drops and you can hear the furnace start but the blower will never kick in. The compressor is locked and will not start. Any ideas on what is happening?" It could be low on refrigerant. Either the blower isn’t working properly or the system is out of balance in some other way. 6 Loud Air Conditioning Noises and Their Causes. The outdoor AC compressor unit is constantly running but the indoor blower fan keeps stopping. Start at the fuse block and see where. It's normal for burner to cycle on and off. My AC works fine. What happens? Does fan only work? Need to know this, first. First time this happened the a/c compressor would engage and disengage, but still no air from the blower. Mine, which was bad read open, so it was easy for me (don't forget my fan worked at full speed). Heater ran great for the first week I had it except I had a squealing so someone told me to turn the heat over to ac and see if it stops the sqeal. My home A/C blower motor runs for a few hours, then will not start again after reaching set temperature. What causes the AC Heater blower fan to stop working on a 1999 cavalier?. When it is cold in the morning it works fine. Either the blower isn't working properly or the system is out of balance in some other way. How to Check if Your AC Fan Motor is Bad in 7 Steps. It is $65 on ebay. And as suddenly as the blower shuts off, 30 seconds to a minute later it starts back up on its own. and see if the fan starts working. Check for power at the motor itself. THANKS in advance for reading my post!!! I've enjoyed reading HVAC-talk posts/articles for many years and finally bit the bullet and joined this morning :grin2: I have a 3 year old Amana 18 SEER Heat Pump Comfort Net System w/variable speed air handler installed on the upper level of my home; humidity levels were high early in the week and caused the plenum/supply box to condensate. The yellow light should be on in all positions EXCEPT O. Is your AC not working? If your central air conditioner is not cooling right, repair it with these expert DIY air conditioning repair techniques. check the fuse & they are good. Sometimes cycling the AC control to Off and then back to MAX will make it start working. Brian - I have a similar problem if you wouldn't mind helping. In cooling in should certainly run for a little while after the compressor stops. Air Conditioning. If your AC fan or compressor is slow to start, doesn't blow any air, blows weakly, blows only warm air, stops after a while, dims your lights, or trips your breaker, you should first check your capacitors and replace them if needed. SYMPTOM SUMMARY The air conditioning system is not cooling as expected. Ok, found a local place that gave me a discount on the Condenser fan motor. the hoses from the compressor are cool. Looking for parts for Case 570LXT Loader Landscapers? Coleman Equipment offers genuine OEM parts online or in one of our Kansas City Area stores - in stock and ready to go. Three years ago I replaced the rear blower motor control module, which caused the rear AC to start working again. 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. Give it a spin with your finger tips, then get your hand out of the way, and turn on the air conditioner. In most cases, a blower motor resistor fails due to corrosion or overheating. From there I would suspect a loose or defective relay but I couldn't tell you where to look. Eventually it always stops working. The 2006 Honda Civic has 4 problems reported for ac stops working intermittently. Then, the blower motor seems to try to run every 10 minutes or so. 5 Common Reasons Why Your Central Air Conditioner Fan Is Not Working. After we help you figure out why your furnace blower starts then stops, we'll show you how to fix it. Sometimes cycling the AC control to Off and then back to MAX will make it start working. This group of input objects is related to electric power serving the facility. If the blower doesn’t start, then the problem could be a fuse inside the furnace, a loose connection or a bad blower motor. I have a simular problem. I noticed the blower motor works and stops working depending on bumps. CAS, Okay and thanks for your help. Is the fan on the outside unit blowing out hot air? If the blower isn't running but the fan outside is, the problem could be the blower motor, it's run capacitor, or the furnace/air handler control board. Why does our Central air conditioner fan starts and then stops? When you are running your air conditioner and it stops then the air conditioner is froze up. Then after about 3 - 4 seconds it starts running again. And as suddenly as the blower shuts off, 30 seconds to a minute later it starts back up on its own. Drove to work,blower fan working fine(all speeds). It gives the fan in your central air conditioner system a boost by changing the phase angle inside the motor. Overall, I love my fusion! UPDATE- I first lubed the upper part of the fan near the blade cyclinder with silicone spray; but the squeaking came back. note: ram trucks that have the ignition service kit installed can be identified by verifying that the blower fan relay is attached to the stop lamp switch bracket (figure 1) and that the color code of the wiring matches that of the wiring diagram (figure 2). Once the temperature approaches the set point the burner should be signaled to shut down. My home A/C blower motor runs for a few hours, then will not start again after reaching set temperature. 1) AC works perfectly fine in the beginning. [HVAC] Runs for a few seconds then stops Our heat pump has been running fine in Cooling mode all this long, hot TX summer, and recently I switched to Heat mode and this morning it started. If your blower isn't working or works intermittently, don't automatically assume you have a bad blower motor. Most of the air conditioning systems that use belts are outdated units. My furnace starts then shuts off. I connected the fan to 12v & it comes on. I had to have the blower motor replaced I think they said it had a dead spot in the motor or something I cannot remember. Sometimes referred to as the PCB, this is an electronic control board that operates the fan motor and compressor circuits using relays mounted on the circuit board. Did you run the ground test by looking at the yellow light inside the AC button? You start the car turn on the fan to #4 with the AC button pressed. Then it started again. Then, the blower motor seems to try to run every 10 minutes or so. " A "High" fan speed is the maximum and commands the internal fan to turn quickly, producing maximum air circulation. Then, after accelerating from a light with the ac on, all of a sudden it started blowing again.