Your boiler is taking a short, programmed break to prevent itself from turning on and off too frequently, which protects the components from unnecessary wear.
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: Anticycling period
What causes this fault?
This occurs when your boiler reaches its target temperature too quickly, often because your radiators have already heated your home or are turned off. To prevent wasting energy and wearing out internal parts by clicking on and off constantly, the boiler enters a temporary 'rest' mode. It is waiting for the system water to cool down slightly before it begins the next heating cycle.
This is more common during the milder autumn and spring months when your home requires less heat to stay warm than in the peak of winter.
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperature.Ensure at least one or two radiators have their valves fully open to allow heat to move away from the boiler.Wait 10 to 15 minutes for the countdown to end, as the boiler will usually restart automatically.
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