What does Fault Code 40 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code 40, there is a short circuit in the flow temperature sensor for heating circuit 2 (with mixer). Check the flow temperature sensor.
What does Fault Code 48 mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code 48, there is a lead break in the flow temperature sensor for heating circuit 2 (with mixer). Check the flow temperature sensor.
What does Fault Code 44 mean on my Viessmann B2TF?
If your Viessmann Boiler displays Fault Code 44, there is a short circuit in the flow temperature sensor for heating circuit 3 (with mixer). Check the flow temperature sensor.
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 does Fault Code db mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code db, there is a short circuit in the room temperature sensor for heating circuit 2 (with mixer). Check the room temperature sensor for heating circuit 2.
What does Fault Code dE mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code dE, there is a lead break in the room temperature sensor for heating circuit 2 (with mixer). Check the room temperature sensor for heating circuit 2 and remote control settings.
What does Fault Code dC mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code dC, there is a short circuit in the room temperature sensor for heating circuit 3 (with mixer). Check the room temperature sensor for heating circuit 3.
What does Fault Code C8 mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code C8, there is a communication error with the external variable speed heating circuit pump for heating circuit 3 (with mixer). Check the setting of coding address "E5".
What does Fault Code dF mean on my Viessmann B2TF?
If your Viessmann Boiler displays Fault Code dF, there is a lead break in the room temperature sensor for heating circuit 3 (with mixer). Check the room temperature sensor for heating circuit 3 and remote control settings.
What does Fault Code bC mean on my Viessmann B2TF Boiler?
If your Viessmann Boiler displays Fault Code bC, there is a communication error with the remote control Vitotrol for heating circuit 1 (without mixer). Check connections, lead, coding address "A0", and remote control settings.
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