31 High
Your boiler has lost its connection with the thermostat or control panel, meaning it cannot receive instructions to turn on or off.
Technical description: Loss of communication with external control (Alpha Climatic)
Typical repair cost: £90-180 (including labour)
DIY fix possible
Check if the batteries in your Alpha Climatic room thermostat need replacing.Ensure the thermostat is within range of the boiler and has not been moved.Try restarting the boiler using the reset button to refresh the connection.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 31 — no call-out fees, no surprises.
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Parts commonly replaced
- Alpha Climatic Receiver
- Room Thermostat batteries
- Control PCB
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