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Mend Ravenheat Come Out Cool

Why does the hot water on my Ravenheat boiler sometimes come out cool?

A Ravenheat 820/20 combi boiler, had diverter valve diaphragm replaced last year as it had perished, now occasionally it will only supply cool water either when central heating is on or off. When h/w is coming out cool the burner is lit, the diverter valve appears to be tranferred so where is the heat going?

Walt
February 2006
RavenheatHeating, Home Heating SystemsCome Out Cool
if the d/valve is ok and the burner is firing for hw-check the hw pipe comming out of the bottom of the boiler next time it happens -if this pipe is roasting and the water out your taps is cool then one of ur mixer taps or shower is faulty-the cold mains is diluting the hw and cooling it down.

stevie
February 2006

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