ive had my boiler for around 10 months now and not had a problem with it until now, when the shower is on it isnt supplying constant hot water like it used to its going hot for a few mins then cold then hot again around 1min later and trying to shower in it doing that is very annoying! Could anyone advise me in what i could do to fix this problem? Also when boiler is off the pressure gauge is at 1.5bar but when its fired up it rises to 2bar is this normal?

c mcculloch, June 2009

What make and model Mr mcculloch.
Your problem most likely to be sludge in the plate heat exchanger of you have one in the boiler.

Mr K, June 2009