AboutJ Cook Expertise With 25+ years experience, I am familiar with residential, commercial, and industrial HVAC equipment including but not limited to boilers, chillers, reciprocating and screw compressors. I am trained in all manners of control wiring.
Experience I currently have three HVAC licenses and Refrigeration license by the State of North Carolina. I have been in this field for over twenty years. I have been a service technician for a contractor and also worked at a state college in the repair and maintenance of steam lines and equipment. I am currently the Building Maintenance Superintendent for a municipality.
Question I our unit is 6MO. old We notices that when the unit goes into defrost mode the outside fan still runs. I know it's should stop.We installed the unit our self,it worked fine through the summer in air conditioning .The weather here has just gotten cold enough for it to defrost often,thats when we noticed the problem.The new white-rodgers 1f79 thermostat quit .I had a janitrol hpt 18-60 t-stat I put on it.I don't know if the t-stat may be the problem or something else. We are retired and on A fixed income,thats the reason we haven't called repair man THANK YOU FOR ANY HELP
Answer The thermostat will have no control over the outdoor fan in defrost mode. This is strictly controlled by the circuit board in the outdoor unit and unless there is some incorrect factory wiring, the board has failed. It will be under warranty. I would write down exactly how the wires are attached, remove the board and go to a distributor or contractor who handles this unit, explain the fan is not cutting off in defrost mode and they will give you a new one. Be sure to have the model and serial number of the unit. Thanks J
