I was called to a home to inspect a heating and cooling system. Upon arrival, I found that the condenser unit was not receiving power. I checked the wiring diagram and found that there was a wire that was not connected. I connected the wire and turned on the power. The transformer popped and the display went blank. I replaced the transformer and the unit started to heat. However, after a minute, the thermostat turned off. I called tech support, and they told me that the control board was the issue. I called Wayne, and he told me that the thermostat was the issue. I replaced the thermostat and the unit is now working properly. Per Wayne, we will need to replace the control board and the thermostat covered by the gap warranty.