To Next PageTo Next PageWhat 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.
What to do if Viessmann WB1A007 displays fault F1?
If the Viessmann Boiler shows a fault F1, which means the maximum flue gas temperature has been exceeded, you should check the heating system fill level and the circulation pump. Ensure you vent the system. Then, press the "Reset" button.
What 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.
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