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ravenheat 82et combi?

when i turn the domestic hot water on and run for 1 minute the central heating towel rail heats up also a small radiator near to the boiler ?
phil bannister, July 2012
thanks tried this still not working new diverter valve needed.

phil, July 2012
divertor valve passing
try turning heating on for a couple of minutes to free up divertor valve

AWOL, July 2012
link Click here to see other fixes for Ravenheat.