BoilerFaultCodesWhat the manual says
Manufacturer manualShort circuit, room temperature sensor
Shared across the Vitodens 100-W Heat Only range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
DIY fix possible
Check if your thermostat or room sensor has run out of batteries.Ensure the thermostat is not placed too close to a heat source or in a cold draught.Try restarting the boiler at the main control panel to see if the error clears.
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Related fault codes
All 105 fault codes on the Vitodens 100-W B1GA
Seeing a different code? Every code this model can display, in one place.