What should I do if my Viessmann B2TF shows error code b7?
If your Viessmann Boiler shows error code b7, it indicates a boiler coding card fault. To fix this, plug in the boiler coding card or replace it if it is faulty.
What does error code E5 mean on a Viessmann Boiler?
If your Viessmann Boiler displays error code E5, it indicates a fault with the flame amplifier. To resolve this, replace the control unit.
What does Fault Code 4C mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code 4C, there is a lead break in the flow temperature sensor for heating circuit 3 (with mixer). Check the flow temperature sensor.
What should I do if my Viessmann B2TF 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.
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 error code EA mean on my Viessmann B2TF?
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.
Why is my Viessmann B2TF Boiler showing error code C6?
If your Viessmann Boiler is showing error code C6, it indicates a communication error with the external variable speed heating circuit pump for heating circuit 2 (with mixer). To resolve this, check the setting of coding address "E5".
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.
What does Fault Code C3 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code C3, there is an extension AM1 communication error. Check connections.
What does error code E4 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays error code E4, it indicates a fault in the supply voltage of 24 V. To resolve this, replace the control unit.
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