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water boiler not firing up when tap is turned on ?

hi just recently i have noticed that my hot water is not as hot as it should be , also today the boiler wont fire up when the tap is turned on so i have got no hot water can you help

miss grice
September 2011
Heating, Home Heating SystemsBoiler Heating Hot Water
Must be the gas valve, nothing else in them to go wrong

bill
September 2011
hi new diaphragm fitted and water heater still wont fire up

miss grice
September 2011
Hi,
Most likely need a new diaphragm, Less than £10 part and an hours labour maximum.

bill
September 2011
hi no its just a water heater

miss grice
September 2011
Is it a combi boiler? Could be plate heat exchanger scaled up

bill
September 2011

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Boiler Not Firing - No Hot Water? | Help