Look up error codes from top heat pump brands. Understand what they mean and when to call an emergency technician.
Mitsubishi heat pump serial communication between indoor and outdoor units has been lost.
Mitsubishi heat pump indoor unit and outdoor unit have lost communication between each other.
Mitsubishi heat pump indoor intake air temperature sensor is reading outside valid range.
Daikin heat pump printed circuit board has detected an internal fault.
Daikin heat pump has activated freeze prevention mode, temporarily stopping operation.
Daikin heat pump compressor temperature or pressure sensor has failed.
Fujitsu heat pump temperature thermistor is reading outside the valid operating range.
Fujitsu heat pump compressor failed to start properly within the expected time frame.
Fujitsu heat pump communication error between indoor and outdoor control assemblies.
LG heat pump outdoor unit control PCB has detected a fault and cannot operate.
LG heat pump inverter DC link voltage is outside the acceptable operating range.
Samsung heat pump indoor fan motor is not operating at the correct speed or has stalled.
Samsung heat pump outdoor fan motor has failed or is not operating correctly.
Carrier heat pump outdoor control board EEPROM data is corrupted or unreadable.
Trane heat pump inverter drive module has detected a fault and cannot operate the compressor.
Carrier heat pump high pressure switch has opened due to excessive refrigerant pressure.
Trane heat pump low pressure switch has opened due to suction pressure dropping too low.
Mitsubishi heat pump defrost temperature sensor has failed open or short circuit.
Daikin heat pump outdoor air temperature sensor has failed.
LG heat pump compressor overload protection has activated due to excessive current draw.
Fujitsu heat pump refrigerant leak detection sensor has activated.
Samsung heat pump communication loss between indoor and outdoor units.
Carrier heat pump outdoor fan motor is locked or drawing excessive current.
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