Category
Boilers
Boiler fault codes with evidence-led diagnosis.
314 published entries
Brands in boilers
All brands
Published error entries
E20Baxi E20 on a gas boiler: heating flow NTC sensor faultyMedium· BaxiE28Baxi E28 on a gas boiler: flue gas NTC sensor faultMedium· BaxiE40Baxi E40 on a gas boiler: heating return NTC sensor faultyMedium· BaxiA04Beretta A04 on a gas boiler: water pressure switch alarmMedium· BerettaA07Beretta A07 on a gas boiler: heating flow sensor faultMedium· BerettaA08Beretta A08 on a gas boiler: heating return sensor faultMedium· BerettaA77Beretta A77 boiler: low temperature thermostat alarmMedium· Beretta105Chaffoteaux 105 on a gas boiler: insufficient water circulationMedium· Chaffoteaux108Chaffoteaux 108 on a gas boiler: not enough water in the systemMedium· Chaffoteaux110Chaffoteaux 110 on a gas boiler: heating flow NTC sensorMedium· Chaffoteaux304Chaffoteaux 304 on a gas boiler: over 5 resets within 15 minutesMedium· ChaffoteauxA03Cointra A03 on a gas water heater: overheat protection lockoutMedium· CointraE3Cointra E3 on TND electric water heater: temperature probeMedium· CointraF09Cointra F09 on a gas boiler: overheat protection triggeredMedium· CointraF37Cointra F37 on a gas boiler: incorrect water pressureMedium· CointraF41Cointra F41 on a gas boiler: maximum Delta T protectionMedium· CointraF43Cointra F43 on a gas boiler: heat exchanger protectionMedium· CointraE02Domusa E02 on an Avanttia NG gas boiler: low water pressureMedium· Domusa TeknikE03Domusa E03 on an Avanttia NG gas boiler: high water pressureMedium· Domusa TeknikE09Domusa E09 on a gas boiler: water circulation failureMedium· Domusa TeknikA08Ferroli A08 on a gas boiler: overheat protection trippedMedium· FerroliF09Ferroli F09 on a gas boiler: overtemperature protectionMedium· FerroliF10Ferroli F10 on a gas boiler: outlet sensor faultMedium· FerroliF11Ferroli F11 on a gas boiler: F11 return sensor anomalyMedium· FerroliF12Ferroli F12 on a gas boiler: hot water sensor faultMedium· FerroliF37Ferroli F37 on a gas boiler: incorrect system water pressureMedium· FerroliF40Ferroli F40 on a gas boiler: heating water pressure too highMedium· FerroliF41Ferroli F41 on a gas boiler: maximum delta T protectionMedium· FerroliF43Ferroli F43 on a gas boiler: exchanger protectionMedium· FerroliF50Ferroli F50 on a gas boiler: limit thermostat fault with b06Medium· FerroliF22Glow-worm F22 on a gas boiler: low water pressureMedium· Glow-wormF24Glow-worm F24 on a gas boiler: temperature rises too quicklyMedium· Glow-wormF75Glow-worm F75 on a gas boiler: no pressure change at pump startMedium· Glow-wormF1Ideal F1 on a gas boiler: low water pressureMedium· Ideal HeatingF4Ideal F4 on a gas boiler: flow thermistor faultMedium· Ideal HeatingL5Ideal L5 on a gas boiler: reset too many times in 15 minutesMedium· Ideal Heating05Immergas 05 on a gas boiler: flow temperature sensor faultMedium· Immergas10Immergas 10 on a gas boiler: water pressure too lowMedium· Immergas142Immergas 142 on a gas boiler: Dominus offline or not connectedMedium· Immergas27Immergas 27 on a gas boiler: insufficient water circulationMedium· Immergas31Immergas 31 on a gas boiler: no communication with the remoteMedium· Immergas45Immergas 45 on a gas boiler: high flow and return delta TMedium· Immergas51Immergas 51 on a gas boiler: no link with the CAR Wireless remoteMedium· Immergas60Immergas 60 on a gas boiler: circulation pump blockedMedium· Immergas61Immergas 61 on a gas boiler: air detected in the circulatorMedium· Immergas89Immergas 89 on a gas boiler: unstable combustion signalMedium· Immergas1019Junkers 1019 gas boiler: incorrect pump type detectedMedium· Junkers2964Junkers Bosch 2964 on a gas boiler: insufficient water flowMedium· Junkers