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odiazAug 30, 2025
What causes fault code C3 on a Viessmann B2TF?
- DDebbie SandovalAug 30, 2025
If your Viessmann Boiler displays fault code C3, it indicates an Extension AM1 communication error. Check electrical connections.
What causes fault code C3 on a Viessmann B2TF?
If your Viessmann Boiler displays fault code C3, it indicates an Extension AM1 communication error. Check electrical connections.
Why is my Viessmann B2TF 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 Fault Code b8 mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code b8, there is a lead break in the flue gas temperature sensor. Check the flue gas temperature sensor.
What does Fault Code dA mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code dA, there is a short circuit in the room temperature sensor for heating circuit 1 (without mixer). Check the room temperature sensor for heating circuit 1.
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 Boiler?
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 B2TF 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 B2TF?
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 B2TF Boiler 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.
What to do if Viessmann B2TF displays fault code A9?
If your Viessmann Boiler displays fault code A9, it indicates that the internal circulation pump is blocked. You should check the circulation pump.
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