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HOW CAN I FIX MY RAVENHEAT BOILER?

I also have a gas ravenheat boiler model number Rsf 820/20 which fires up when hot water is required but wont fire up when i put the central heating on??
MR. SANDHU, November 2007
sounds like flow switch. this is part of the divertor valve (brass round part in the centre. £80+ just 4 the part.

will, January 2008
link Click here to see other fixes for Ravenheat.