S.28 Low
Your boiler has temporarily paused to prevent it from turning on and off too frequently, which helps save energy and protect the internal components.
Technical description: Anti-cycling mode
Typical repair cost: £0 (including labour)
DIY fix possible
Wait for 15-30 minutes for the internal timer to finish its countdown.Check that your radiators are turned up to allow heat to escape the system.Ensure your room thermostat is set high enough to call for heat.
Protect yourself from future repair bills
A boiler cover plan would cover faults like S.28 — no call-out fees, no surprises.
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