Carrier 52CQ PTAC, Condenser ices over when outside temperture below 40 Degrees. Compressor does not stop running even if outside temperture below 25 Degrees. Auxiliary heat will be on without being manually activated and compressor will still be running.
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What breaker? The breaker for the condenser? Likely have a compressor shorted to ground or drawing locked rotor amps. Easiest way to tell is make sure breaker off, unhook compressor wires from contactor. Turn on breaker and turn on machine. If the breaker does not trip, obviously problem with compressor
Try the control relay/ condenser thats attached to the compressor and provides a momentary spike to start the compressor start windings prior to the unit going into run mode. reasonable and easy to fix
The compressor will normally be 100 to 110 degrees. I would suspect the thermostat or mouse damage in the freezer area. Also, if you keep it overstocked, to the point of poor air circulation, you could just have ice blockage. Put the frozen food in a styrofoam cooler or a good heavy corrugated box and give the unit a good full defrosting.
hello. this is a common problem. The thermostat for a refrigerator/freezer is in the refrigerator part. Normally the refrigerator is kept at around 40 degrees. The compressor turns on as required to maintain this tempearture. The evaporator coils are concentrated in the freezer side, so that the freezer stays at around 0 degrees while the fridge side is held at 40.
If the ambient temp is around 25 degrees, the refrigerator compartment will get below the setpoint of 40 degrees, and gradually continue down towards 25 degrees. The compressor will not have to run at all to maintain this. In fact, the compressor is designed not to run, once the refrigerator compartment gets below the setpoint, for fear of freezing the contents of the fridge.
The lack of circulating refrigerant due to the non-running compressor means that the freezer compartment will gradually warm up to 25 degrees.
If the unit were just a freezer, it would work fine in the unheated garage. If it were just a refrigerator, it would not run in these conditions, and the contents would eventually freeze, but it is otherwise OK.
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you have to decide if the fridge is faulty or the thermostat
if you think it is the thermostat thet bridge out the switching contacts that make the compressor run
is the compressor running constantly
is the cooling fan working
is the condenser blocked with dirt
if 1 of these are at fault then the fridge is not going to drop the temerature