Checked system. There was no power to the thermostat. There is a condensate pump in the attic next to the unit. When arrived, the blower door was off and the pump was unplugged. Plugged the pump in and it was in alarm due to the tank was full. It pumped the water out properly and it came out of alarm. Checked all the low voltage wires. There is an overflow switch in the secondary pan. The overflow switch is not operating properly, there is no water in the pan and it’s breaking the circuit. The overflow switch needs to be replaced. Removed the wires for the overflow temporarily to get the system running. Checked the charge, the system is low on refrigerant. Added 15 oz R410a to the system. 60*f discharge air. The system is operating properly at this time. Need to order and return to replace the pan switch.