Technical description
Control mode: Vitotrol remote control incorrectly encoded
What causes this fault?
This fault occurs when there is a mismatch between the boiler's settings and the physical remote control device installed on your wall. It essentially means the boiler is looking for a specific type of controller that it cannot find or recognize, often due to an incorrect configuration code being entered into the system. In some cases, a loose connection or damaged wiring between the boiler and the thermostat can also trigger this communication failure.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.