S.28 Low
Your boiler is taking a short, programmed break to prevent the burner from starting and stopping too frequently while heating your water.
Technical description: Hot water burner anti-cycling time
Typical repair cost: £0 (including labour)
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
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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