My Baxi combi boiler (133HE) is not heating the upstairs radiators (with the exception of the bathroom radiator) - and overall, hot water supply in the taps seems reduced/unreliable (non existent hot water from the bathroom tap).

Pressure gauge indicates the system is on the brink of being low but fault light isn't on.

Does anyone have any advice ?

Thanks

Cold of Nottingham, November 2008

why have you left it on the brink of being low ? top up to 1.5 bar and see if that cures it, but the most common cause by the sound of it is the system needs a damn good flush

mark the gay boiler man, November 2008