my 350 worcester combi boiler works ok untill I turn the heating off then after a short time it looses pressure and I have to top it up to get hot water it happens every time I turn the heating off, I have put a new pressure relief valve on but this has not cured my problem.
this could be caused by the pressure vessle not being charged with air and all you need to do to solve this is find the valve, attach a pump and bring the air pressure in the vessle to around 2 bar
mike
January 2009
the water must be going somewhere is it still coming out of the prv ?
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