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Posted by Neil on October 01, 2004 at 03:31:50:
In Reply to: Re: Expansion tank posted by HeatPro on September 27, 2004 at 07:54:56:
Thanks for the info, unfortunately it doesn't seem to be the expansion tank, a repair man came and tested the tank and said it was fine, also the pressure would increase only when the heating came on not when it was switched off and cool. so far we've ruled out the expansion tank and the filling point control valve, someone has mentioned something called a "plate heat exchanger" I have no idea what this does, do you and could you explain please?? and that to replace this is very expensive! any help would be most appreciated