BoilerFaultCodesTechnical description
Hot water burner anti-cycling time
What causes this fault?
This status occurs when your boiler reaches its target temperature too quickly and needs to pause to prevent the internal components from wearing out. It is the boiler's way of protecting itself from 'short-cycling,' which usually happens because the heat has nowhere to go or the water is already at the desired temperature. Once the internal timer finishes and the water has cooled slightly, the boiler will fire up again automatically.
This is more common during the autumn and spring when your heating is turned on but the outdoor temperature is mild, meaning the boiler doesn't need to run for long to reach the required heat level.
DIY fix possible
Wait for 5 to 10 minutes for the countdown to finishEnsure hot water taps are fully closedCheck that the pre-heat (Comfort mode) is not set too high