Your boiler is taking a short, planned break to prevent the system from turning on and off too frequently, which protects the internal components and saves energy.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Anti cycling period
What causes this fault?
This status occurs when the boiler has reached its target temperature and needs to pause briefly to prevent the burner from clicking on and off too quickly. It is usually triggered because the heat has nowhere to go, such as when your radiators are already hot or the room thermostat has almost reached its setting. By waiting a few minutes before firing up again, the boiler reduces unnecessary wear on the components and operates more efficiently.
This is more common during autumn and spring when the weather is milder and your home doesn't require the boiler to run at full power for long periods.
DIY fix possible
Wait for 10 to 15 minutes as this is a normal operating status and not a faultEnsure your room thermostat is turned up to your desired temperatureCheck that your radiator valves are open to allow the heat to dissipate
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like S.08 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm Ultrapower sxi is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.