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james70Sep 13, 2025
What does Fault Code C3 mean on my Viessmann B2TB004 Boiler?
- NnwilliamsSep 13, 2025
If your Viessmann Boiler displays Fault Code C3, there is an extension AM1 communication error. Check connections.
To Next PageTo Next PageWhat does Fault Code C3 mean on my Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays Fault Code C3, there is an extension AM1 communication error. Check connections.
What causes fault code C3 on a Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays fault code C3, it indicates an Extension AM1 communication error. Check electrical connections.
Why is my Viessmann Boiler showing fault code 30?
If your Viessmann Boiler displays fault code 30, this indicates a short circuit in the boiler water temperature sensor. Check the boiler water temperature sensor.
What does error code EA mean on my Viessmann B2TB004?
If your Viessmann Boiler displays error code EA, it indicates that the ionisation current lies outside the permissible range during calibration. To resolve this, check the ionisation electrode and cable, and then press reset button R.
What should I do if my Viessmann Boiler displays error code Fd?
If your Viessmann Boiler shows error code Fd, it indicates a burner control unit fault. Check the ignition electrodes and connecting cables. Verify that there isn't a strong electromagnetic interference (EMC) field near the equipment. Press reset button R. If the fault persists, replace the control unit.
How to fix fault code CF on Viessmann Boiler?
If your Viessmann Boiler displays fault code CF, it indicates a communication error with the LON communication module. Replace the LON communication module.
What does fault code dE mean on Viessmann B2TB004?
If your Viessmann Boiler displays fault code dE, it indicates a lead break in the room temperature sensor, heating circuit 2 (with mixer). Check room temperature sensor for heating circuit 2 and remote control settings.
What does Fault Code b0 mean on my Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays Fault Code b0, there is a short circuit in the flue gas temperature sensor. Check the flue gas temperature sensor.
What does Fault Code bE mean on my Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays Fault Code bE, there is a communication error with the remote control Vitotrol for heating circuit 3 (with mixer). Check connections, lead, coding address "A0", and remote control settings.
Why does my Viessmann B2TB004 display fault code b1?
If your Viessmann Boiler is showing fault code b1, there may be a communication error with the programming unit. To resolve this, check the connections and replace the programming unit if necessary.
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