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Breaker on window air conditioner tripped, i reset it and its now holding but the air conditioner now only blow's warm air and a alarm inside the unit go's off about every 10 sec, any ideas??

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Hi, the only part on your unit that will draw enough amps when it has a problem, is the compressor. It must have overloaded and exceeded its R.L.Amp's to trip it. Now that the breaker is holding and you have no cooling, I would say that the windings in the compressor are not shorted to ground, but are open internally inside. There's not much you can do about this problem. It may also be open on its external overload protector. Here's what you can try anyway, to see if you can get this unit back on line only if the overload on the compressor is open, turn the unit to fan only to at least have air circulating, or just unplug it. Take a garden hose outdoors and wash out the condenser coil to remove all of the dirt. This will cause the compressor to over load and the system to build up high head pressures that will trip the main a/c breaker. Wash it very good. Let the compressor cool down, this may take several hour before it will reset the over load. You can turn off the breaker and if you can see the compressor from out side you can run cool water over it to help it cool down. Let it dry good before turning breaker back on. When you are ready, turn it on and listen for the compressor to come on from outdoors, it will make a fairly loud humming sound when running. If it does nothing, either the run capacitor is faulty, or the compressor has open windings if it doesn't run and the breaker holds. If breaker trips again, the compressor reset, but is shorted or has a locked rotor. It wouldn't be worth the $$$ to have a tech out to charge you an arm and leg to tell you what I am telling you, it would be better to price a new a/c. I am just being honest with you and trying to save you some $$$. Please keep me posted on what you will do, as it will take a meter and gauges to trouble shoot the unit, but from what it is doing, I am confident it is your compressor as the alarm is telling you there is a problem. Most a/c companies will pull the unit and take it to bench it and the hours build up very fast. For the cost of a compressor and the labor to R & R would buy you 2- new units. I know this is frustrating as it is for me to give you this news. You can call around to see what they will charge to come out to see, but I am sure you will end up with a large bill and the unit will still be down. Please don't forget to rate me as I know you will be kind, and keep me posted after you wash this coil to see if this compressor starts. Be outside and have some helper turn it on so you can listen for it to kick in. Please let me know.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Posted on Sep 01, 2010

  • jstokes555 Sep 04, 2011

    Thank you very much Shastalaker7! A very good start for me.

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Hi, your problem is in the unit outside. Check to see if the fan is on, make sure the compressor is running also. If nothing is on, check the breaker to see if it tripped. Also, the box at the unit has 2- fuses inside behind the plastic cover you can't see unless you remove it. If the unit is off and the breaker was ok, remove the cover and replace BOTH fuses. Do all of this and let me know. If the breaker keeps tripping or blowing fuses if the unit was off, you have a componant shorted. It may be off or on and not cooling well due to a loss of freon. If it is on, hold your hand above the fan to feel the air. It should be nice and warm almost hot if its hot outside. Let me know what you find please. We can find the problem.
Sincerely,
Shastalaker7

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