Category
Boilers
Boiler fault codes with evidence-led diagnosis.
314 published entries
Brands in boilers
All brands
Published error entries
F50Cointra F50 on gas water heater: modulating gas valve faultHigh· CointraF96Cointra F96 on a gas boiler: unstable flame after ignitionHigh· CointraE06Domusa E06 on an Avanttia NG gas boiler: burner lockoutHigh· Domusa TeknikE07Domusa E07 on an Avanttia NG gas boiler: safety thermostat tripHigh· Domusa TeknikE41Domusa E41 on an Avanttia NG gas boiler: repeated flame errorHigh· Domusa TeknikE84Domusa E84 on a gas boiler: gas inlet pressure errorHigh· Domusa TeknikA01Ferroli A01 on a gas boiler: no burner ignitionHigh· FerroliA02Ferroli A02 on a gas boiler: flame signal with the burner offHigh· FerroliA03Ferroli A03 on a gas boiler: overtemperature protectionHigh· FerroliA05Ferroli A05 on a gas boiler: fan supply, signal or fan faultHigh· FerroliA06Ferroli A06 on a gas boiler: no flame after ignitionHigh· FerroliA09Ferroli A09 on a gas boiler: exchanger or overtemperature protectionHigh· FerroliA14Ferroli A14 gas boiler: flue temperature safety lockoutHigh· FerroliA15Ferroli A15 gas boiler: air signal protection lockoutHigh· FerroliA62Ferroli A62 on gas boiler: gas valve communication lostHigh· FerroliA63Ferroli A63 on a gas boiler: AGC01 controller malfunctionHigh· FerroliF05Ferroli F05 on a gas boiler: air or fan faultHigh· FerroliF07Ferroli F07 on a gas boiler: flue gas temperature too highHigh· FerroliF13Ferroli F13 on a gas boiler: flue gas sensor faultHigh· FerroliF56Ferroli F56 on a gas boiler: incorrect calibration faultHigh· FerroliF62Ferroli F62 on a gas boiler: combustion fault on BlueHelix ProHigh· FerroliF68Ferroli F68 on a gas boiler: BCC Service file load errorHigh· FerroliF96Ferroli F96 on a gas boiler: unstable flame after ignitionHigh· FerroliF20Glow-worm F20 on a gas boiler: safety thermal cut out operatedHigh· Glow-wormF27Glow-worm F27 on a gas boiler: flame signal with burner offHigh· Glow-wormF28Glow-worm F28 fault: ignition unsuccessfulHigh· Glow-wormF29Glow-worm F29 on a gas boiler: flame lost, failed to reigniteHigh· Glow-wormF2Ideal F2 on a gas boiler: flame loss or ignition lockoutHigh· Ideal HeatingF3Ideal F3 on a gas boiler: fan faultHigh· Ideal HeatingL1Ideal L1 on a gas boiler: overheat or no water flowHigh· Ideal HeatingL2Ideal L2 fault: ignition lockoutHigh· Ideal HeatingL6Ideal L6 on a gas boiler: false flame lockoutHigh· Ideal Heating01Immergas 01 on a gas boiler: ignition failure lockoutHigh· Immergas02Immergas 02 on a gas boiler: overheat safety thermostat lockoutHigh· Immergas03Immergas 03 on a gas boiler: flue gas thermostat lockoutHigh· Immergas08Immergas 08 on a gas boiler: available resets used upHigh· Immergas62Immergas 62 on a gas boiler: full calibration missingHigh· Immergas69Immergas 69 on a gas boiler: possible flue gas returnHigh· Immergas94Immergas 94 on a gas boiler: combustion control faultHigh· Immergas96Immergas 96 on a gas boiler: air intake or flue ducts blockedHigh· Immergas2951Junkers Bosch 2951 on a gas boiler: too many flame lossesHigh· Junkers2980Junkers Bosch 2980 on a gas boiler: super lockout after resetsHigh· Junkers8CJunkers 8C on a gas boiler: super lockout after repeated faultsHigh· JunkersC1Junkers C1 on a gas boiler: pressure switch opens or fan too slowHigh· JunkersC4Junkers C4 on a gas boiler: pressure switch contact does not openHigh· JunkersC6Junkers C6 on a gas boiler: fan or air pressure switchHigh· JunkersC7Junkers C7 on a gas boiler: fan not running or no air flowHigh· JunkersCFJunkers CF gas water heater: flue blocked or too little airHigh· Junkers