To Next PageTo Next PageWhat to do if Viessmann Boiler displays fault F2?
If your Viessmann Boiler is showing fault code F2, indicating that the temperature limiter has responded, you should check the heating system fill level and the circulation pump. Make sure to vent the system. Inspect the temperature limiter and its connecting leads. Finally, press the "Reset" button.
What to do if Viessmann WB1A007 shows fault E3?
If your Viessmann Boiler displays fault E3, indicating a fault in the safety chain, you should check the temperature limiter and its connecting leads. Also, check the control unit; replace it if necessary.
How to fix Viessmann WB1A007 fault F9?
If your Viessmann Boiler displays fault F9, and the cause is fan speed being too low during burner start, examine the fan, its connecting cables, and the power supply. Check the fan control. Then, press the "Reset" button.
What to do if Viessmann WB1A007 Boiler shows fault F4 (Check gas train)?
If your Viessmann Boiler displays fault F4 related to the gas train, you should check the gas train, ensuring the control voltage is at 230V. Also, verify the gas supply pressure.
What to do if Viessmann WB1A007 Boiler shows fault F4 (Measure ionisation current)?
If you're seeing fault F4 on your Viessmann Boiler related to measuring ionization current, you should measure the ionization current. Also, check the electrode adjustment and inspect the gas line for any airlocks.
What to do if Viessmann WB1A007 Boiler shows fault F9 after approx. 51 s?
If your Viessmann Boiler displays fault F9 after approximately 51 seconds, check the fan, fan connecting cables, power to the fan, and fan control.
How to solve the issue when Viessmann WB1A007 control unit issues no Increase set value?
To address the issue where the Viessmann Boiler control unit does not increase the set value, increase the set value and ensure that heat is being drawn off.
What to do if Viessmann Boiler shows Fault F4 (Check the ionisation current)?
If your Viessmann Boiler shows Fault F4 related to the ionization current, you should check the ionization current itself. Also, inspect the electrode adjustment and the gas pipe, ensuring there are no air-locks.
What to do if Viessmann WB1A007 Boiler shows Fault F4 (Check the gas train)?
If your Viessmann Boiler displays a Fault F4 related to the gas train, examine the gas train, ensuring the control voltage is at 230 V. Also, verify the gas supply pressure.
What to do if Viessmann WB1A007 Boiler stops below the set boiler water temperature and restarts immediately?
If your Viessmann Boiler stops below the set boiler water temperature and restarts immediately, you should check the flue gas system for tightness, looking for flue gas recirculation. You should also check the gas flow pressure.
General