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Condenser fan nor compressor not pulling on - Heating & Cooling

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Thanks for you question,
First thing you will need to look at is the Breakers in the breaker panel, is the breaker tripped ? make sure by flipping the breaker to off then on, sometimes it doesn't show as tripped, if that's ok, then the next thing to check is the fuses in the disconnect next to the condenser, make sure you shut the breaker off to the unit first, then remove the fuse and Ohm check them if you have no reading on either one, then you should replace them both, after replacing them, turn the power back on and hopefully your unit will fire right off ! if these first things dont work, let us know we can go deeper into what else might be the problem, thanks again,
mr.grzz

Posted on Jan 25, 2009

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Posted on Jan 02, 2017

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Does confessor/compressor fan blow air onto compressor or suck hot air away from compressor?this is whirlpool refrigerator


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If I understand you correctly the compressor is short cycling. The more it does this the worse it gets by causing the compressor to overheat. Sometimes the problem is because the condenser fan or evaporator fan being defective. Pull away from wall and remove cover over compressor unplug and feel top of compressor and if too hot to keep hand there keep unplugged but do examine the evaporator and condenser fan to eliminate them as a reason. The most likely reason is start relay and or start/run capacitor and sometimes a worn out compressor.
sea_breeze_4.gif
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Location Click Here=> MBB1952GR Compressor Components
Parts in that photo are marked as 10 overload/relay, 11 is the run capacitor and 3 being condenser fan motor. Condenser and evaporator fan motors do not always stop completely when bad so make sure both run while compressor is running. If this has been helpful please rate if you have more questions please let me know, Thanks Sea Breeze
sea_breeze_16.jpg

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Good day,
On models with 2 compressors the condenser fan motor runs 24/7. It must since the compressors run randomly and that motor must be on since it handles both units.

Fan noise is subjective. It itself makes little noise but the blade does. If for example the blade was changed from the nylon style to a metal blade (good idea) then it would be somewhat louder.
If the noise is not objectionable then I would use it as is.

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1 Answer

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Its an indication that your compressor is running hotter than normal due to a dust/hair clogged condenser coi. Remove the machine compartment cover on the top. This is usually held in place with two 12" long spring clips, sometimes its held in place with two screws, the former will tilt out by hand, the latter will not. Look at the outer side of the condenser coil, opposite from the compressor(s) and the fan motor. is it thick with dust and pet hair? If you can see any aluminum shining, its probably not that bad, and i would then check to see if the condenser fan motor is running. This fan motor pulls in cooler air from your kitchen, across the condenser coil, through the fan itself, then blows it further across the compressor(s). If this fan is not blowing, the compressors wont get cooled, and prematurely shut off during refrigeration cycle. If this fan is blowing, and condenser is cleared, you have more serious problems, and i would recommend you have an Expert Sub-Zero Refrigerator Repair service inspect and diagnose your problem

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1 Answer

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There is a condenser fan down at the compressor area that isn't running at enough rpms to properly cool compressor. You will need to clean the condenser coils and also install new condenser fan. The compressor is over heating and shutting down on internal overload. Replace this fan and you will be good to go. As an emergency aid you can pull unit from wall about 6 to 12 inches and place a fan in the front area out of your way letting it blow air thru the front over the compressor until you can get the fan. Hope this helps and good luck.

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Hi, you say compressor and fan are running, you have 2 fans, a condenser fan motor in the back behind the panel at the bottom, and the evaporator fan in the freezer. When you check the condenser fan in back by the compressor, check the front of the coil to make sure it is clean as the fan pulls air through the coil to keep internal pressures down. You may have a sheet of dust on it. Check these things and get back to me. Keep me posted.
Sincerely,
Shastalaker7

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1 Answer

4 ton rheem 3yrs old thermostat


It is possible that the relay in the thermostat for "cooling" has gone bad. The relay that runs the blower is different than the condenser relay. Check that you have 24v AC coming from the t-stat to the "y" terminal at the air handler. That same "y" wire should go out to the condenser, make sure then that you have 24v out there. If you have 24v at the condenser then see if the contactor is pulling in. If not then you may have a loss of charge switch that is stopping the current to the contactor. See if you have 24v to the coil of the contactor. If the contactor is pulling in and power is going to the compressor then the compressor has failed. If this is the case the condenser fan will be running but the compressor is not. If neither the condenser fan or the compressor is running then you have a problem in the 24v circuit, which could be a bad wire or a safety switch.

As you can see there are a number of possibilities for your problem. You will need to methodically go through everything to eliminate the possiblities till you isolate the problem,

I hope that this will help you to solve your problem and get you cooling again!

Thanks for using Fixya!

Heatman101

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Hope this helps clear it up .

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