Hoping someone can help me. I have a heat pump which is giving me a 4 flash code which means "Discharge temp. didn't reach approx 90 F within 1 hour of compressor operation.
The service tech changed the temperature sensor, tonight it happened again. Should that sensor be insulated? There's no insulation on it and I'm wondering if there should be insulation wrapped on it. The tech checked the pressure readings and all seemed fine with the unit.
I don't think that the temperature sensor is the culprit but something is shutting down the outside unit.
Any help would be much appreciated. I live in Ontario and the evening temperatures are in the -7degree celcius and the evening temp are around -15 C.
Thanks guys and gals.