Question about Heating & Cooling
!st off, do you mean the indoor unit does nothing period as wont run? or wont cool?if it wont run, the checking breakers/fuses etc is a waste of time, as the transformers clearly providing the 24 volts to operate the contactor outside.If you switch your fan to "on" does the fan run?if not, check fan relay, or board or motor/cap etc.If the fan does run with the fan switch set to on, but not in cool mode, the auto function that sends power to green /fan via yellow?cool terminal in the tstat is open and not allowing the 24v to energize the fan relay.
Posted on Feb 24, 2012
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Posted on Jan 02, 2017
there are many problems it could be. first off check the breaker box to make sure hasn't tripped. call 254-722-1891 for Dallas area A/C service.
Posted on Jun 18, 2009
It sounds like your condenser fan motor may be locked up or the capacitor that helps give the condenser fan motor a kick to get it started may be defective. Try turning your system on and using a long screwdriver try to push the fan blade on the condenser fan motor to see if it will run normally if you give it the starting boost it needs.If it does run at full speed and doesn't over heat or start and then slow down then you probably only need to replace a simple 10-12$ capacitor. If it barely turns, makes an odd humming sound or overheats etc. then you will have to replace the condenser fan motor. This is assuming that the outdoor condenser has the 220v supplied and the 24v supplied to the compressor relay, that the compressor relay is engaged and suppling 220v to the condenser fan motor.
Posted on May 30, 2008
SOURCE: air conditioner
Remote control units have diagnostic program in the
control, after 3 to 5 minutes of operating if the diagnostic
tools detect abnormal operation, then its shutdown the unit
to protect from damage. Thermistor sensor is one of the
parts that detect the operation of the unit. Out of range
or defective thermistor can shut the operation of the unit.
- If your indoor and outdoor is clean start the unit in cool mode and monitor the outdoor pipes. If your suction pipe is icing or dry then your unit is under charge, but if your suction is cold and sweating then the system is ok and sure that the thermistor sensor is defective.
- Out of range thermistor sensor in both return air and freeze up sensor can cause the tripping “off “ the unit. The resistance of both thermistor is 8 to 10k ohms, so can test by using ohm meter
Posted on Jan 12, 2008
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