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Viessmann — Vitodens 050-W
Select a fault code
Fault Codes
F0Electronics fault🔧 Engineer Required
Internal electronics fault.
F2Temperature limit🔧 Engineer Required
Flow temperature limit exceeded.
F3Temperature sensor fault🔧 Engineer Required
Flow temperature sensor reading out of range.
F4Flame failure🔄 Try Reset
Burner failed to ignite or flame sensor fault.
F7Flue fault🔧 Engineer Required
Flue gas or air supply fault.
F8Ignition lockout🔄 Try Reset
Repeated ignition failure.
F9Fan fault🔧 Engineer Required
Fan not reaching required speed.
b0Low pressure warning🔄 Try Reset
System pressure approaching minimum operating level.
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Protect against future repair bills
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HometreeFrom £7/month
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HomeServeFrom £9/month
24/7 call-out, 4-hour emergency response
British GasFrom £10/month
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Prices shown are indicative — actual cost depends on your boiler age and policy type.
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Download ↗ViessmannManuals & Documentation
Installation guides, user manuals, technical documentation
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