Came out to a no heat. The customer stated that the heat isn’t keeping up. Upon diagnosing the system I found that the thermostat was wired for conventional heat and not for a heat pump. The thermostat wire going to the outdoor unit is a 2 wire and need to be 5 wires. The HP switch has been disconnected from the defrost board and only the W and C are connected. We will need to run a new thermostat wire into the house so that the system can function correctly. After we have run the new thermostat wire we can then continue are diagnostic check to verify that there are no further issues. We added a new 5 wire and continue to diagnose the system and found that the system is also low on refrigerant. We will need to do a leak check to pin point the leak. The system is going out on low pressure and the leak will need to be found and corrected to rectify the problem. The system is currently heating via electric heat.