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Vaillant Turbo Max VUW 242 E, DHW not opereating?

Vaillant turbo max 242/282 E. Domestic hot water on demand wont operate from kitchen only, will work from bath first and then supply kitchen could this be weak diaphragm or air pressure switch? boiler approx 7 years old
L STEVENS, April 2007
Sounds like you need a new diverter valve.

Mark man, April 2007
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