What does fault code 50 mean on my Viessmann WB1A007 Boiler?
If your Viessmann Boiler displays fault code 50, it indicates a short circuit in the cylinder temperature sensor. You should check the sensor.
How to fix fault F9 on a Viessmann Boiler?
To address fault F9 on your Viessmann Boiler, check the fan, the fan connecting cables, the power at the fan, and the fan control.
Why does my Viessmann Boiler burner stop and restart quickly?
If your Viessmann Boiler burner stops below the set boiler water temperature and restarts immediately, check the flue system for tightness (flue gas recirculation) and the gas flow pressure.
What does fault code 51 mean on my Viessmann WB1A007?
If your Viessmann Boiler displays fault code 51, it means there is a short circuit in the outlet temperature sensor. Check the sensor.
What does fault code 30 mean on my Viessmann WB1A007?
If your Viessmann Boiler displays fault code 30, it indicates a short circuit in the boiler water temperature sensor. Check the boiler water temperature sensor.
What does fault code 10 mean on my Viessmann Boiler?
If your Viessmann Boiler displays fault code 10, it indicates a short circuit in the outside temperature sensor. Check the outside temperature sensor and lead.
What does fault code 38 mean on my Viessmann Boiler?
If your Viessmann Boiler displays fault code 38, it indicates a lead break in the boiler water temperature sensor. Check the boiler water temperature sensor.
What does fault code 18 mean on my Viessmann WB1A007 Boiler?
If your Viessmann Boiler displays fault code 18, it indicates a lead break in the outside temperature sensor. Check the outside temperature sensor and lead.
What to do if Viessmann WB1A007 Boiler shows fault F4?
If your Viessmann Boiler displays fault code F4, indicating no flame signal, you should inspect the ionisation electrode and its connecting cables. Also, verify the gas pressure, gas train, ignition, ignition module, and condensate drain. After these checks, press the "Reset" button.
How to troubleshoot fault F4 on a Viessmann WB1A007?
If your Viessmann Boiler is showing fault F4, check the ignition module connection.
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