The system was drained to replace a faulty (leaking) radiator, and after two visits by Corgi registered plumbers they informed us that there was an airlock in the system and needed to be bled over and over again to remove air, despite several attempts,radiators come warm for a short time then go cold. Hot water to taps OK. Surely this cannot be right as when originally installed it would not take that long to commision. Any Ideas please?

John Stockton, November 2008

Hi, worked on loads of powermax's pretty simple good boiler. they've got two pumps, on a heating demand does the flow from boiler get hot? it may be simply the heating cicuit pump that's knackered (technical term for a malfunction) .

gasbanni, December 2008

is this a powermax 155 ?

b, November 2008