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Posted by Mike on January 10, 2005 at 00:37:20:
I have had a problem for a while now in that the water pressure in my area varies consinderable during the day. I have had to turn the incoming stop cock down to compensate for the high prseeure. In the morning it is very high and when I draw Hot water the boiler vibrates if I open the tap fully, the hot water temp etc is OK, closing the tap slightly stops the vibration, in the evening I do not get any vibration because the water pressure is fine. I have noticed recently that if the combi boiler is switched off completely I get the same vibration at high water pressure when I open the hot water tap, but obviously no hot water. Does anyone know if I have a problem with my combi boiler?