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Blower motor in home air conditioner does not work

The blower motor for the furnace and air conditioner does not run. The outside compressor runs.

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The most common failure for this problem is either the start/run capacitor or the fan motor. IF YOU ARE NOT experienced with electricity then I would strongly suggest hiring a technician. The volts are 220 with a potential of 50 amps in a common residential unit.

If you are knowledgeable in this area then make sure the motor has volts to it. If it does have volts and does not spin, it is bad. You can sometimes tell by feeling the motor it will probably be very hot. The compressor will eventually shut itself off when it over heats. It usually will restart after it cools down(sometimes many hours). The motor and capacitor are pretty generic and can be matched up at a local Grainger store or whatever Retail, specialty store that you have in your area.

I hope this helps:)

Posted on Jun 25, 2008

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1 Answer

Intertherm MGHA-070ABFC-05 will not run/cool


Multiple problems. Eliminate thermostat first. Remove face from wall and turn on breaker. If fan still runs you have a bad board or bad relay. If fan outside is running compressor should be too. These operate on same contactor. Verify you are getting 24 volts to coil side of contactor. If odf stops working and contactor remains pulled in you have a bad motor. If odf motor stops working the compressor will shut off due to overheating.

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Capacitor Failure Symptoms are sometime harder to identify without the right tools and expertise. Capacitors can be found in several different sizes and shapes. There may be one or multiple capacitors included in your ac with regards to the design. While the most popular capacitors are the types found on circuit boards, the ones most associated with air conditioning will be the bigger capacitors that assist start and run your motors. There are several motors present in an conditioner and heater systems:
  1. Compressor Motor Run Capacitor: Here is the most popular capacitor that fails. Most of the time these are duel capacitors, which means that there are 2 capacitors built into one. A duel capacitor will have three terminals on the top where a single capacitor will simply have two terminals on top.
  2. Outside Fan Motor Run Capacitor: That is the smaller capacitor found with or part of the Compressor Motor Capacitor. It helps start and run the outside fan that blows air through the outside coils.
  3. Indoor Blower Motor Run Capacitor: Similar to the outdoor fan motor capacitor, it is a small, single (two terminals) capacitor that will help start and run the indoor blower motor.
  4. Start Capacitor: Some models include an auxiliary start capacitor that helps jump start the motors. Most are found on the compressor. These are less common.

You may need to get that checked out.
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I had the same problem,if you do not monitor that you will make matters worst and burn the Compressor.your problem is the blower unit it has three speed sometimes four.it needs to be changed..

May 20, 2012 | Heating & Cooling

1 Answer

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If you have no airflow in your home at all then the blower is not running. You may have a bad blower motor or a bad motor capacitor or even a wiring problem in your furnace/air handler.Any of these things require working with high voltage and using specialized tools and any tests should be performed by a qualified professional.

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Problem #1:Outdoor condensing fan motor has stopped running. This problem could be caused by a bad motor run capacitor. If your motor capacitor is not the problem, then more than likely you need a new motor. Is the fan blade tight, stiff or hard to turn? If the fan blade is hard to turn then you probably need a new motor. Problem #2: Air conditioner compressor will not start. When power is applied to the air conditioning outdoor unit the fan starts, but you hear a sound like the compressor is trying to start, "UGGG"..., for about 5 to 10 seconds and then all you hear is the outdoor condenser fan run. The compressor is locked and will not start. What is happening is the compressor is trying to start, but because the compressor motor is locked it tries to start for a few seconds and then because of the high amperage being drawn goes off on internal overload. The internal overload protects the compressor windings from overheating and burning up. I see this many times during the start of the air conditioning season. Some compressors just have a hard time starting after sitting all winter long. Some compressors are locked up so bad that I can not start them and must tell my customer that they need a new compressor . Many times I can get the compressor started again without having to buy a new compressor or new air conditioning system by using the device that is called, "Super-Boost." I keep two or three of these on the truck. They have saved many of my customers from having to buy new air conditioning systems.

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1 Answer

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Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool…

Air Conditioner Trouble - Review the Possibilities

heatman101

Sep 01, 2010 | Coleman Heating & Cooling

1 Answer

Sometimes, when the inside blower shuts down, the


I was leaning towards a bad contactor. Either sticking sometimes or not making good contact. I would inspect the contactor for pits or burn marks near the contacts. DO SO WITH POWER OFF of course...but, what's the reset button you are referring to?? I'm assuming this is a heat pump, please send model number!!

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Bad blower motor/capicitor or relay. Check the fuse if it has one.

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1 Answer

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sounds like the relay for the unit may be bad, usually if a blower motor goes it stops or has a very loud humm and only goes slow

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