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.
What to do if Viessmann Boiler displays fault code 38?
If your Viessmann Boiler displays fault code 38, it indicates a lead break in the boiler water temperature sensor. Check the boiler water temperature sensor.
Why is my Viessmann VITODENS 242-F 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 d6 mean on a Viessmann VITODENS 242-F Boiler?
If your Viessmann Boiler displays fault code d6, it means Input DE1 reports a fault at extension EA1. Remove fault at the appliance concerned.
What does fault code dE mean on Viessmann VITODENS 242-F?
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 b1 mean on my Viessmann VITODENS 242-F Boiler?
If your Viessmann Boiler displays Fault Code b1, this indicates a communication error with the programming unit. You should check the connections and replace the programming unit if necessary.
What does fault code 20 mean on my Viessmann Boiler?
If your Viessmann Boiler displays Fault Code 20, there is a short circuit in the system flow temperature sensor. Check the low loss header sensor.
What does Fault Code bE mean on my Viessmann VITODENS 242-F?
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 b7 mean on a Viessmann VITODENS 242-F?
If your Viessmann Boiler displays fault code b7, this indicates the boiler coding card is faulty. Try plugging in the boiler coding card, or replace it if it is faulty.
Why does my Viessmann 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.
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