S.30 Low
Your boiler is working fine, but your thermostat or external timer is not currently telling it to turn the heating on.
Technical description: No heating demand from external controls
Typical repair cost: £0-120 (including labour)
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperature.Ensure your central heating programmer or timer is set to 'On' or 'Auto'.Replace the batteries in your wireless thermostat if the screen is blank or showing a low battery symbol.
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.30 — no call-out fees, no surprises.
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Parts commonly replaced
- Thermostat batteries
- External room thermostat
- Heating programmer
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