Outside heat pump not running at all
I live in Tennessee and we are getting temps in the 20's. I have two heat pumps, one for 1st floor and one for 2nd floor. The 1st floor unit seems to run fine, the 2nd floor outside unit does not run at all. It has been this way for a few weeks. On this unit the inside air handler and aux elec. heat is all that is working right now. I would like to check whatever I can prior to calling my service co. Any Ideas? Thanks
This is what I would check before I called a service person
Don't know if these new units still have what I am going to say but the first thing I would check is to make sure you are getting power to the unit.
Than I would check the starter relay to insure it is providing power to the compressor first by the thermostat call for the unit to come on which should activate the relay providing power to the compressor. If not by manually activating the starter relay to see if the compressor starts.
If that doesn't work I would turn off the power and pull the three leads off the compressor and check for continuity between leads on the compressor with an ohm meter. Should read something. If no reading the compressor has an open winding....
I would also check the leads to see if you have any shorted lines in the compressor by checking resistance between that and the compressor can.
Should get no reading on the ohm meter. If reading the compressor winding is shorted.