Medium
bE on Viessmann Vitodens 100-W WB1A

Your boiler is having trouble communicating with your wall-mounted thermostat, which is likely due to the two units not being electronically synced or a loose data wire.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Vitotrol remote control incorrectly encoded

From this model's manual
Verified against the Viessmann Vitodens 100 W Wb1a installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Switch off the power to the boiler at the fused spur or consumer unit.Inspect the wiring connection between the Vitotrol unit and the boiler to ensure it is secure and undamaged.Restart the boiler to see if it re-establishes a connection with the remote control.

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