To Next PageTo Next PageWhy 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 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 20 on a Viessmann Boiler mean?
If your Viessmann Boiler displays fault code 20, it indicates a short circuit in the system flow temperature sensor. Check the low loss header sensor.
How do I fix fault code 28 on my Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays fault code 28, it indicates a lead break in the system flow temperature sensor. Check the low loss header sensor.
What does Fault Code db mean on my Viessmann 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 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.
What does Fault Code Cd mean on my Viessmann B2TB004 Boiler?
If your Viessmann Boiler displays Fault Code Cd, there is a communication error with Vitocom 100 (KM BUS). Check connections, Vitocom 100 and coding address "95".
What does Fault Code C5 mean on my Viessmann B2TB004?
If your Viessmann Boiler displays Fault Code C5, there is a communication error with the variable speed internal pump. Check the setting of coding address "30".
What causes fault code A7 on a Viessmann B2TB004?
If your Viessmann Boiler displays fault code A7, it means the programming unit is faulty. Replace programming unit.
What does fault code bA mean on Viessmann Boiler?
If your Viessmann Boiler displays fault code bA, it indicates a communication error with the extension kit for heating circuit 2 (with mixer). Check extension kit connections and code.
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