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ch working fine but no hot tap water?

Hi my radiators are working fine but when i try my taps the water runs mild and the red l(demand light) does not light up.
any ideas

mike hill
December 2007
Heating, Home Heating SystemsCh Working Fine Hot Tap Water
hot water diaphragm split/warped or microswitch maybe! more likely to be diaphragm though!

kev!
December 2007

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