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home Fix label Heating label_important Home Heating Systems category Bosch

bosch highflow 400 making loud hissing noise?

my boiler is making a loud hissing noise and the pump is very hot and it cuts out when heating or hot water is switched on.anyone have any ideas??
mario, November 2008
home Fix label Heating label_important Home Heating Systems category Boschdone
You've already spoken to Worcester about this today, haven't you?

BunSlinger, November 2008
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