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Viessmann — Vitopend 100-W
Select a fault code
Fault Codes
F0Electronics fault🔧 Engineer Required
General electronics fault.
F2Temperature limit🔧 Engineer Required
Flow temperature exceeded safe limit.
F3Sensor fault🔧 Engineer Required
Flow temperature sensor fault.
F4Flame failure🔄 Try Reset
Boiler failed to ignite or flame sensor not detecting flame.
F7Flue gas fault🔧 Engineer Required
Abnormal flue gas temperature or air supply fault.
F8Ignition lockout🔄 Try Reset
Lockout after repeated ignition failures.
F9Fan fault🔧 Engineer Required
Fan speed outside permitted range.
b0Low pressure🔄 Try Reset
System pressure approaching minimum.
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