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Posted on Jan 02, 2017
SOURCE: RE: Heat Pump
it would sound likely the check valve assembly for the indoor coil isnt checking corectly . some units have orphis assembly and some have thermostatic expantion valves with check valve . eather way youll not be able to make repairs without correct equipment to open the sealed system and look for the problem . You will have to call in the experts im sorry to say. wish i could have helped more. please leave fead back. thanks
Posted on Oct 21, 2008
If it was me I would cnage the sensor first. Simply because it is way cheaper than the control board and these sensors are fickle as hell to begin with.
Posted on May 14, 2009
Running the heat pump in low outside ambient temps. will definitely cause the coil to ice up. An ouside temperature senor or a wind baffle should be installed in climates that get below freezing. This would definitely cause the heat pump to operate at lowered efficency and maybe not at all. It should go into defrost mode if the sensor is working correctly when the coil ices up.
Posted on Dec 20, 2009
SOURCE: Dear Expert, I am the owner
Most likely you have a stuck check valve....
When the reversing valve switches for heating, the check is not opening so the pressure builds till the high limit shuts it down and then the compressor shuts down...
The pressure then spins the compressor backwards which makes alot of noise...
Find a certified refrigerant tech. that can diagnose the system and change out the bad valve...
This is NOT a DIY project!!
Posted on Apr 06, 2011
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