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Compressor hums but fan not turning. Pushed fan to

Central air conditioner compressor hums but fan not turning. Pushed fan to help and fan turned and unit started. Capacitor or fan motor problem?

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Cap most likley

Posted on Jul 16, 2009

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Why compressor does not hums the fan is turning then breaker turns off


The compressor motor has a start capacitor that probably has gone bad. There is a starter overload contactor on the compressor that may be bad as well. Worst case the motor has locked up. A service technician has the tools to try to get the compressor going before its diagnosed as totally bad

Sep 08, 2014 | Goodman Manufacturing GSZ140361 Heat Pump,...

1 Answer

Whynter Portable Air Conditioner Model: ARC-14S. Problem: It sounded as if something fell inside the unit while it was operating (cooling) then it started to vibrate horribly. The vibration is only...


Hi,Whynter Portable Air Conditioner has many moving parts, and they all make noise and cause vibrations. Some of these parts are more likely to causing shaking and loud noises, and sometimes this signals a larger problem, something to watch and scrutinize. If serious enough, it calls for a repair.

Loose Parts

Loose parts cause the majority of shaking and vibration noises in your air conditioner. A few of the most common loose parts include the air compressor, the piston rods and even the fan or blower unit itself. These noises are clunking, clanking sounds that occur along with a vibrating action. The only method of repair is a complete compressor replacement, which is a repair only a certified air conditioner technician is qualified to make. The compressor is a fully sealed component, so individual parts in the compressor cannot be repaired.

Fan Blades

Fan blades cause noise, shaking and vibrations even when properly secured. If fan blades contact the exterior structure of the air conditioner due to a bent fan blade or broken and misaligned grate, a constant, repetitive noise and vibration results, which sounds like a ticking or banging from the interior of the air conditioner. Vibration in this case is limited but still present.

Mounting Brackets

When an air conditioner shakes, there is a problem with the mounting brackets. These brackets hold the air conditioner compressor steady as it operates. Normal vibrations and shaking would otherwise occur without these brackets. A loose mounting bracket causes the air conditioner to rock back and forth and creates a clanking sound. As the compressor starts up, this rocking and clanking sound begins, resulting in a very loud and fast vibration and noise. It also occurs when the unit shuts down.

Other Sounds and Vibrations

Sometimes air conditioners squeal, hiss, hum or screech. Each noise is often accompanied by a vibration. Humming sounds along with a vibration may indicate a bad capacitor, the electrical part responsible for starting the machine. Hissing sounds tend to indicate a pressure problem while screeching and squealing sounds are fairly common in window air conditioners and in central air conditioners. This sound is also a result of the compressor motor. It usually starts when the unit turns on and continues through its normal operating cycle. Vibrations always occur in the air conditioner due to moving parts and the compressor motor's operation.


Hope it helped..

Aug 18, 2011 | Whynter Portable Air Conditioner

1 Answer

I need help with a buzzing sound in my air conditioner.


It is probably the compressor humming. They can make some funny noises especially on start for a while. If the unit is not cooling it may be the start capacitor or the comressor may be locked up.

Jul 19, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

When turn to air it does not blow out cool air and makes humming noise, the fan part works ok


Compressor has locked up or gone to groud. The humming is the compressor letting you know its bad.

Dave

Dec 08, 2009 | GE AJCQ08ACB Air Conditioner

1 Answer

My Unit hums but the compressor never seems to turn on.


usually the humming sound is the compressor.is the fan running? If the fan is not running get on the roof and stick a long screw driver through the holes in the cover and move the fan. it may be seezed.

Jul 16, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Central air conditioner doesn't cool


no cooling means outside unit is not operating due to
-no thermostat signal
- condenser dirty need cleaning
- fan motor stucked 90% this the reason of noize

Apr 27, 2009 | Heating & Cooling

1 Answer

My new Amana compressor Central Air-Heat Pump hums very loudly


When it hums, is it running? Or does it not run when it hums? I'm assuming it runs when you say you have to turn the therm off to get the noise off.. If it's humming and not running, you have big problemo friend..

Dec 02, 2008 | Amana PTH123B25AJ Heat Pump Air...

2 Answers

Air conditioner fan will not come on and unit will run for 1 minute and stop


You hear the compressor kick in (Hum) but no fan comes on? Will the fan come on when just in fan mode, not cool, or do you have that set-up?

Aug 13, 2008 | Dometic Rooftop RV Air Conditioner

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