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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.
Why is my Viessmann VITODENS 242-F Boiler displaying fault code dd?
If your Viessmann Boiler displays fault code dd, it indicates a lead break in the room temperature sensor, heating circuit 1 (without mixer). Check room temperature sensor for heating circuit 1 and remote control settings.
How to troubleshoot fault code dC on a Viessmann Boiler?
If your Viessmann Boiler displays fault code dC, it indicates a short circuit in the room temperature sensor, heating circuit 3 (with mixer). Check room temperature sensor, heating circuit 3.
What does fault code db mean on a Viessmann VITODENS 242-F Boiler?
If your Viessmann Boiler displays fault code db, it indicates a short circuit in the room temperature sensor, heating circuit 2 (with mixer). Check room temperature sensor, heating circuit 2.
What should I do if my Viessmann VITODENS 242-F shows fault code dA?
If your Viessmann Boiler displays fault code dA, it indicates a short circuit in the room temperature sensor, heating circuit 1 (without mixer). Check room temperature sensor, heating circuit 1.
How to resolve fault code d8 on a Viessmann VITODENS 242-F?
If your Viessmann Boiler displays fault code d8, it means Input DE3 reports a fault at extension EA1. Remove fault at the appliance concerned.
What does fault code d7 mean on my Viessmann VITODENS 242-F Boiler?
If your Viessmann Boiler displays fault code d7, it means Input DE2 reports a fault at extension EA1. Remove fault at the appliance concerned.
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.
How to fix fault code CF on Viessmann VITODENS 242-F?
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 CE mean on my Viessmann VITODENS 242-F?
If your Viessmann Boiler displays fault code CE, it indicates a communication error with ext. extension. Check electrical connections.
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