S.31 Low
Your boiler is currently set to summer mode, which means it is only providing hot water and has intentionally ignored the request for central heating.
Technical description: No heat demand summer operating mode
Typical repair cost: £0 (including labour)
DIY fix possible
Locate the radiator temperature dial or button on the boiler control panel.Turn the dial clockwise or adjust the setting to increase the target heating temperature.Ensure your wall thermostat or heating programmer is also set to 'On' or a high temperature.
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.31 — no call-out fees, no surprises.
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