Warranty call. Found outdoor unit not running. Board was flashing a code of temperature sensor lockout. Cut power to board and restarted system. Checked air handler in attic also. System is operating but I changed the sensor wire on the heat pump in case it has an intermittent fault. Cycled system and educated clients on heat pump system and thermostat operations.
Checked/changed filters, checked thermostats, checked heating elements and blower amps, checked evap coil, checked drain pan and line, checked capacitor, checked fan and compressor amps, checked pressures, cleaned condenser coils. Installed UV light. 1 system: 2018