boiler keeps running even when hot water tap is turned off?

It sounds like a combination boiler, its normal for the fan too carry on on some boilers when the tap is turned off, if the main gas burner stays on after tap is off, the boiler may have a preheat, a device within the boiler that heats a small ammount of water, so when needed, it is available quicker too the tap, it just depends on boiler make and model. jon

jon wells
August 2009

sounds like a sticking micro switch.

what boiler is it ?

hi-spec plumbing & heating (essex)
August 2009