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ravenheat rsf820/2t?

boiler wont fire when asking for hot water.in summer/winter mode or just summer mode.can only get hot water if i put heating on.dhw stat only clicks now and then.but still no reaction from boiler.
micheal, August 2006
change diaphram in diverter valve

dave, September 2006
Probably your water flow switch.

ccMods, August 2006
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