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when select hot water i need to turn on heating as well?

hot water will not work without turning on heating on my ferroli 901 boiler
adrian price, August 2007
Its probably the flow switch, shouldn't need a whole new diverter just a diaphram.

Neil (Baxi engineer), August 2007
I don't know if it is the same thing, but my Vallient had the same fault recently and it needed a "diverter valve". It cost £350 for a plumber to fix it!

Ramases, August 2007
link Click here to see other fixes for Ferroli.