Viessmann F1 Fault Ignition Failure +352 20 60 22 22 Weber &
Viessmann F1 fault: burner fails to ignite. Ignition electrode, gas supply or transformer. Viessmann heating engineer Luxembourg 24/7.
Error code F1 on a Viessmann boiler (Vitodens 100, Vitopend 100) indicates an ignition failure — the burner attempts to ignite but fails. The boiler shuts down for safety after 2-3 attempts.
Possible causes: worn or fouled ignition electrode, faulty ignition transformer, gas supply interruption, or faulty control unit.
Before calling, check that your other gas appliances work (cooker). If so, the problem is internal to the boiler.
- Viessmann F1 fault diagnosis
- Ignition electrode replacement
- Ignition transformer check
- Gas supply verification
- Compatible Vitodens and Vitopend
FAQ
Can I reset a Viessmann F1 fault myself?
A reset is possible. If F1 returns immediately or after a few hours, the electrode or ignition transformer is faulty — professional intervention needed.
How to check if it's a gas cut or internal fault?
Test another gas appliance (cooker, another boiler). If it works, it's internal to your Viessmann. If nothing works, contact Enovos/Creos.
How much does a Viessmann ignition electrode cost?
Common part. A quote is provided on site before any work.
Is the F1 fault dangerous?
The boiler automatically shuts down for safety — no immediate danger. But don't force repeated resets (more than 3) without diagnosis to avoid gas accumulation.
Does Weber & Fils handle F1 Viessmann faults?
Yes, across the entire Vitodens and Vitopend range in the Grand Duchy. Call +352 20 60 22 22.