Error Codes
All AC and boiler error codes — type your code in the search box
| Code | Brand | Device | Meaning |
|---|---|---|---|
| E1 | Daikin | Air Conditioner | Main PCB fault |
| E2 | Daikin | Air Conditioner | Dry running protection |
| E3 | Daikin | Air Conditioner | Pressure switch error |
| E4 | Daikin | Air Conditioner | Outdoor unit sensor fault |
| E5 | Daikin | Air Conditioner | Compressor overcurrent |
| E6 | Daikin | Air Conditioner | Indoor unit PCB fault |
| E7 | Daikin | Air Conditioner | Outdoor fan motor fault |
| E8 | Daikin | Air Conditioner | High temperature protection |
| E9 | Daikin | Air Conditioner | Thermal regain fault |
| F3 | Daikin | Air Conditioner | Discharge pipe temp error |
| H6 | Daikin | Air Conditioner | Compressor position detection |
| H8 | Daikin | Air Conditioner | Low current detection |
| E1 | Mitsubishi | Air Conditioner | Control circuit board fault |
| E2 | Mitsubishi | Air Conditioner | Thermostat abnormal |
| E3 | Mitsubishi | Air Conditioner | Outdoor unit abnormal |
| E4 | Mitsubishi | Air Conditioner | System fault |
| E5 | Mitsubishi | Air Conditioner | Freezing/defrosting fault |
| E6 | Mitsubishi | Air Conditioner | Compressor drive fault |
| E7 | Mitsubishi | Air Conditioner | Outdoor unit fan fault |
| E8 | Mitsubishi | Air Conditioner | Over-temperature |
| P1 | Mitsubishi | Air Conditioner | Overcurrent protection |
| P3 | Mitsubishi | Air Conditioner | Compressor temperature protection |
| E1 | Samsung | Air Conditioner | Indoor EDS fault |
| E2 | Samsung | Air Conditioner | Outdoor EDS fault |
| E3 | Samsung | Air Conditioner | Outdoor fan motor error |
| E4 | Samsung | Air Conditioner | Compressor malfunction |
| E5 | Samsung | Air Conditioner | Outdoor 3-phase error |
| E10 | Samsung | Air Conditioner | Outdoor 1-phase error |
| C4 | Samsung | Air Conditioner | Insufficient gas / Valve control |
| C5 | Samsung | Air Conditioner | Outdoor pipe sensor |
| CH01 | LG | Air Conditioner | Indoor main PCB error |
| CH02 | LG | Air Conditioner | Outdoor main PCB error |
| CH03 | LG | Air Conditioner | Outdoor fan motor error |
| CH04 | LG | Air Conditioner | Outdoor sensor error |
| CH05 | LG | Air Conditioner | Indoor sensor error |
| CH06 | LG | Air Conditioner | Compressor protection |
| CH07 | LG | Air Conditioner | Outdoor high temperature |
| CH09 | LG | Air Conditioner | Outdoor communication error |
| CH10 | LG | Air Conditioner | Filtering error |
| CH34 | LG | Air Conditioner | Outdoor low current |
| E1 | Carrier | Air Conditioner | Outdoor unit fault |
| E2 | Carrier | Air Conditioner | Outdoor PCB fault |
| E3 | Carrier | Air Conditioner | Outdoor fan error |
| E4 | Carrier | Air Conditioner | Outdoor phase fault |
| E5 | Carrier | Air Conditioner | Indoor PCB fault |
| E6 | Carrier | Air Conditioner | Freezing sensor error |
| E1 | Bosch | Air Conditioner | Sensor fault |
| E2 | Bosch | Air Conditioner | Thermostat fault |
| E3 | Bosch | Air Conditioner | Outdoor fan fault |
| E4 | Bosch | Air Conditioner | Compressor fault |
| E5 | Bosch | Air Conditioner | Outdoor PCB fault |
| E1 | Baymak | Air Conditioner | Indoor main PCB |
| E2 | Baymak | Air Conditioner | Outdoor main PCB |
| E3 | Baymak | Air Conditioner | Compressor fault |
| E4 | Baymak | Air Conditioner | Outdoor fan fault |
| E5 | Baymak | Air Conditioner | Sensor error |
| E1 | DemirDöküm | Air Conditioner | Main PCB fault |
| E2 | DemirDöküm | Air Conditioner | Sensor fault |
| E3 | DemirDöküm | Air Conditioner | Compressor fault |
| E4 | DemirDöküm | Air Conditioner | Outdoor fan fault |
| E5 | DemirDöküm | Air Conditioner | Indoor fan fault |
| E1 | Toshiba | Air Conditioner | Main PCB fault |
| E2 | Toshiba | Air Conditioner | Sensor error |
| E3 | Toshiba | Air Conditioner | Compressor fault |
| E4 | Toshiba | Air Conditioner | Outdoor fan error |
| F3 | Toshiba | Air Conditioner | High temperature protection |
| H11 | Panasonic | Air Conditioner | Outdoor unit fault |
| H14 | Panasonic | Air Conditioner | Outdoor sensor fault |
| H15 | Panasonic | Air Conditioner | Indoor sensor fault |
| H16 | Panasonic | Air Conditioner | Compressor fault |
| H19 | Panasonic | Air Conditioner | Outdoor fan fault |
| E1 | Sharp | Air Conditioner | Main PCB fault |
| E2 | Sharp | Air Conditioner | Outdoor sensor fault |
| E3 | Sharp | Air Conditioner | Compressor fault |
| E4 | Sharp | Air Conditioner | Outdoor fan fault |
| E5 | Sharp | Air Conditioner | Indoor fan fault |
| E1 | Electrolux | Air Conditioner | Main PCB fault |
| E2 | Electrolux | Air Conditioner | Outdoor sensor fault |
| E3 | Electrolux | Air Conditioner | Compressor fault |
| E4 | Electrolux | Air Conditioner | Outdoor fan fault |
| E1 | Whirlpool | Air Conditioner | Main PCB fault |
| E2 | Whirlpool | Air Conditioner | Sensor fault |
| E3 | Whirlpool | Air Conditioner | Outdoor fan fault |
| E4 | Whirlpool | Air Conditioner | Compressor fault |
| E1 | General | Air Conditioner | Main PCB fault |
| E2 | General | Air Conditioner | Sensor fault |
| E3 | General | Air Conditioner | Outdoor fan fault |
| E1 | Hitachi | Air Conditioner | Main PCB fault |
| E2 | Hitachi | Air Conditioner | Outdoor sensor fault |
| E3 | Hitachi | Air Conditioner | Compressor fault |
| E1 | Fujitsu | Air Conditioner | Main PCB fault |
| E2 | Fujitsu | Air Conditioner | Outdoor sensor fault |
| E3 | Fujitsu | Air Conditioner | Compressor fault |
| E4 | Fujitsu | Air Conditioner | Outdoor fan fault |
| F0 | Vaillant | Boiler | Flow temp sensor error |
| F1 | Vaillant | Boiler | Return sensor error |
| F2 | Vaillant | Boiler | Outdoor sensor error |
| F3 | Vaillant | Boiler | Exhaust sensor error |
| F5 | Vaillant | Boiler | Outside sensor fault |
| F7 | Vaillant | Boiler | Flame detection error |
| C6 | Vaillant | Boiler | Pressure switch fault |
| C7 | Vaillant | Boiler | Fan motor fault |
| C9 | Vaillant | Boiler | Over temperature protection |
| EA | Bosch | Boiler | Flame not established |
| E1 | Bosch | Boiler | Water pressure error |
| E2 | Bosch | Boiler | Sensor error |
| C4 | Bosch | Boiler | Water pressure sensor error |
| C6 | Bosch | Boiler | Flue blockage |
| C7 | Bosch | Boiler | Fan fault |
| E1 | DemirDöküm | Boiler | Over temperature |
| E2 | DemirDöküm | Boiler | Sensor error |
| E3 | DemirDöküm | Boiler | Exhaust error |
| E4 | DemirDöküm | Boiler | Pressure error |
| E5 | DemirDöküm | Boiler | Flame error |
| E6 | DemirDöküm | Boiler | Fan fault |
| EA | Buderus | Boiler | Flame not established |
| E1 | Buderus | Boiler | Pressure error |
| E2 | Buderus | Boiler | Sensor error |
| E9 | Buderus | Boiler | Temperature sensor error |
| C4 | Buderus | Boiler | Differential pressure error |
| A01 | Ferroli | Boiler | Flame not established |
| A02 | Ferroli | Boiler | Pressure switch error |
| A04 | Ferroli | Boiler | Sensor error |
| A06 | Ferroli | Boiler | Exhaust sensor error |
| E01 | Ferroli | Boiler | Over temperature |
| A01 | Ariston | Boiler | Ignition failure |
| A02 | Ariston | Boiler | Flue/exhaust error |
| A03 | Ariston | Boiler | Low water pressure |
| A04 | Ariston | Boiler | Lockout |
| A06 | Ariston | Boiler | Exhaust sensor error |
| E1 | ECA | Boiler | Low water pressure |
| E2 | ECA | Boiler | Exhaust error |
| E3 | ECA | Boiler | Sensor error |
| E4 | ECA | Boiler | Fan fault |
| E5 | ECA | Boiler | Ignition failure |
| F01 | Beretta | Boiler | Sensor error |
| F02 | Beretta | Boiler | Pressure error |
| F03 | Beretta | Boiler | Exhaust error |
| F04 | Beretta | Boiler | Ignition failure |
| F0 | Viessmann | Boiler | Flow sensor fault |
| F5 | Viessmann | Boiler | Outdoor sensor fault |
| F7 | Viessmann | Boiler | Flame detection error |
| C6 | Viessmann | Boiler | Pressure switch fault |
| C7 | Viessmann | Boiler | Fan motor fault |
| E01 | Immergas | Boiler | Ignition failure |
| E02 | Immergas | Boiler | Pressure error |
| E03 | Immergas | Boiler | Sensor error |
| E05 | Immergas | Boiler | Fan fault |
| E1 | Protherm | Boiler | Pressure error |
| E2 | Protherm | Boiler | Sensor error |
| EA | Protherm | Boiler | Ignition failure |
| F02 | Protherm | Boiler | Pressure sensor error |
| E1 | Baymak | Boiler | Pressure error |
| E2 | Baymak | Boiler | Sensor error |
| E3 | Baymak | Boiler | Exhaust error |
| E4 | Baymak | Boiler | Ignition failure |
| E5 | Baymak | Boiler | Fan fault |
| E1 | Alarko | Boiler | Sensor error |
| E2 | Alarko | Boiler | Pressure error |
| E3 | Alarko | Boiler | Exhaust error |
| E4 | Alarko | Boiler | Ignition failure |
| E5 | Alarko | Boiler | Fan fault |
| A01 | Junkers | Boiler | Ignition failure |
| A02 | Junkers | Boiler | Flame lost |
| A03 | Junkers | Boiler | Pressure error |
| A06 | Junkers | Boiler | Sensor error |