I performed diagnostic on York Air Conditioning Unit. I found that transformer has failed and is not sending voltage through. I replaced transformer with customers approval. I found that existing thermostat is bad. I installed new Honeywell T6 to test system. System kicked on normally. Customer requested to have thermostat removed. She stated that she will install Nest thermostat herself. I removed thermostat and shut off 15 amp breaker to furnace. System Not Operational at time of departure.
