Junkers
Independent technical reference
Junkers
40 published entries
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Equipment covered
Documented codes
Gas boiler 32
2951Junkers Bosch 2951 on a gas boiler: too many flame lossesHigh· Boilers2980Junkers Bosch 2980 on a gas boiler: super lockout after resetsHigh· Boilers8CJunkers 8C on a gas boiler: super lockout after repeated faultsHigh· BoilersC1Junkers C1 on a gas boiler: pressure switch opens or fan too slowHigh· BoilersC4Junkers C4 on a gas boiler: pressure switch contact does not openHigh· BoilersC6Junkers C6 on a gas boiler: fan or air pressure switchHigh· BoilersC7Junkers C7 on a gas boiler: fan not running or no air flowHigh· BoilersE5Junkers E5 on a gas boiler: flow temperature over the limitHigh· BoilersE9Junkers E9 on a gas boiler: temperature limiter trippedHigh· BoilersEAJunkers EA on a gas boiler: no flame detectedHigh· BoilersF0Junkers F0 on a gas boiler: internal electronics faultHigh· BoilersF7Junkers F7 on a gas boiler: flame detected with the appliance offHigh· BoilersFAJunkers FA on a gas boiler: flame still detected after gas shut-offHigh· BoilersFbJunkers FB boiler code: gas valve failed its leak testHigh· Boilers1019Junkers 1019 gas boiler: incorrect pump type detectedMedium· Boilers2964Junkers Bosch 2964 on a gas boiler: insufficient water flowMedium· Boilers2971Junkers Bosch 2971 on a gas boiler: water pressure too lowMedium· Boilers810Junkers Bosch 810 on a gas boiler: hot water stays coldMedium· Boilers811Junkers 811 gas boiler: hot water disinfection failedMedium· Boilers9UJunkers 9U on a gas boiler: HCM coding plug fault code 233Medium· BoilersA1Junkers A1 on a gas boiler: pump blocked or running on airMedium· BoilersA7Junkers A7 on a gas boiler: hot water temperature sensor faultMedium· BoilersA8Junkers A8 on a gas boiler: EMS or BUS communication faultMedium· BoilersD1Junkers D1 on a gas boiler: return temperature sensor faultMedium· BoilersD3Junkers d3 on a gas boiler: external controller TB1 trippedMedium· BoilersD4Junkers D4 on a gas boiler: water temperature rising too fastMedium· BoilersE2Junkers E2 on a gas boiler: flow temperature sensor faultMedium· BoilersEFJunkers EF on a gas boiler: boiling detected in the heatingMedium· BoilersFDJunkers FD boiler code: power cut or reset pressed by mistakeMedium· BoilersH07Junkers H07 boiler code: heating water pressure too lowMedium· BoilersH11Junkers H11 on a gas boiler: hot water outlet sensor warningMedium· BoilersCCJunkers CC on a gas boiler: outdoor sensor not detectedLow· Boilers
Tankless gas water heater 7
CFJunkers CF gas water heater: flue blocked or too little airHigh· BoilersE1Junkers E1 on gas water heater: outlet water overheatingHigh· BoilersE4Junkers E4 gas water heater: flue gas leak, casing overheatHigh· BoilersEEJunkers EE on gas water heater: modulation solenoid faultHigh· BoilersA0Junkers A0 on gas water heater: inlet and outlet sensorsMedium· BoilersCAJunkers CA gas water heater: water flow above the maximumMedium· BoilersECJunkers EC gas water heater: flame lost while runningMedium· Boilers