[jason_4412]

Help! My problem started with the compressor not running with the heat switch on. I checked the thermostat wiring and found that the tstat was not wired per the manual for a heat pump with aux heat. I fixed that problem and the unit would run but not blow warm air. I called out a technician and he said I needed a new tstat and a defrost board. Also note that after the tech left the unit will not do anything! I can't even get the fan to run. Since then I've replaced the defrost board, contactor, outside breaker, and tstat. (The outside breaker needed replaced because one pole was only putting out 8 volts.) All my wires between the tstat and unit are good (continuity check) I have 240V coming in to the unit -- NO 24V from transformer-- but the coils test OK? When I push in the contactor no operation of any thing. Are there any safety switches or something else that's tripped that would cause all components not to work? I have a payne PH1ZNA030000AAAA heat pump.

[hvac1000]

Call the tech back. You should have had them fix to start with then it would be there responsibility to get it running correctly. You may have thought you saved a few $$ but actually now you will spend more$$.

[labman]

Check for a fuse on control voltage. Easy enough to blow while you are checking things.