BoilerFaultCodesTechnical description
Control mode without remote control: Communication fault - Vitotrol remote control heating circuit A1
What causes this fault?
This fault occurs when the boiler's main internal computer loses its digital link with the Vitotrol thermostat or remote control unit. The most common reason is a break in the physical wiring between the two devices or a temporary electronic glitch in the communication module. In some cases, it can be caused by the remote control unit itself failing due to age or internal component wear.
DIY fix possible
Check if the batteries in your Vitotrol unit need replacingEnsure the remote control is correctly docked in its wall bracketTurn the boiler power off and back on at the fused spur to reset the connection
Find a Gas Safe engineer
Search the official register →