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Viessmann Boiler Error Codes

Viessmann Vitodens 050 Boiler Error Codes

F10: External temperature sensor short circuit.
F18: External temperature sensor disconnection.
F30: Burner blockage. Boiler temperature sensor short circuit.
F38: Burner blockage. Boiler temperature sensor disconnection.
F51: Hot water not prepared. Outlet temperature sensor short circuit.
FOA: Burner blockage. Flow sensor short circuit or disconnection.
F59: Hot water not prepared. Outlet temperature sensor disconnection.
Fb0: Burner blockage. Flue gas temperature sensor short circuit.
Fb8: Burner blockage. Flue gas temperature sensor disconnection.
FF1: Maximum flue gas temperature exceeded.
F02: Burner fault. Safety thermostat triggered.
F03: Flame signal detected before burner ignition.
F04: No flame signal detected.
F06: Air pressure switch did not open or close during burner operation.
06: Heating system pressure is too low.

Viessmann Vitodens 100 Boiler Error Codes

0b: Heating water flow is low.
OC: Low mains voltage.
10 / 18: External air temperature sensor issue.
30 / 38: Heating temperature sensor issue.
50 / 58: Hot water temperature sensor issue.
51 / 59: Radiator flow temperature sensor issue.
A9: Room thermostat connection issue.
E4: Power supply issue.
E6: Low water pressure issue.
B5 / E5 / F0: Internal system fault.
F2: Overheating issue.
F3: Incorrect flame signal.
F4: Ignition fault.
F5: Air prosestat fault.
F7: Water pressure sensor fault.
F8: Gas valve fault.
F9: Fan fault.
FA: Fan motor is constantly running.
Fd: Electronic board fault.
FE: Electrical circuit issue.

Viessmann Vitopend 100 Boiler Error Codes

0b: Heating water circulation is low.
A0: Low gas pressure from the mains.
E0 / F6: Issue with the flue system.
F2: Overheating error.
F3: Incorrect flame signal.
F4: Ignition failure.
F5: Problem in the flue system.
F30: Radiator NTC sensor fault.
38: Radiator outlet NTC sensor short circuit or disconnection.
F38: Radiator sensor disconnection.
F51: Hot water NTC sensor fault.
B0 / B8: Flue gas sensor fault.
59: Hot water sensor disconnection or short circuit.

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