S.00 Low
Your boiler is working correctly but is currently idle because your thermostat or programmer is not telling it to turn on the heating.
Technical description: Heating mode error – no heat demand
Typical repair cost: £0-80 (including labour)
DIY fix possible
Check that your room thermostat is set higher than the current room temperatureEnsure your heating programmer or timer is set to 'ON' or 'AUTO'Replace the batteries in your wireless thermostat if the screen is blank
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.00 — no call-out fees, no surprises.
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Parts commonly replaced
- Thermostat batteries
- External heating controls
- Receiver box
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