Discharge Air Warmer Or Cooler Than Set Temperature

Check refrigerant volume and pressures. Check engine coolant volume. Check compressor drive belt and condenser cooling fan. Check ambient temperature sensor, evaporator temperature sensor and solar sensor. Check air mix servomotor, compressor, condenser, receiver-drier, evaporator and heater core. Check expansion valve A/C amplifier, lower A/C-heater control unit and wire harness/connectors.