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can any1 help on saunier duval combi boiler?

all radiotors work well but hot water dont.please help if u can
ben, March 2007
Sounds like the diaphragm, ive had my boiler for 15 years and changed it every 4-5 years plus two pumps.

Robert, April 2007
Check out what I suggested above. The hot water and heating are seperate controls. Which model is it. Apart from the new ones the principal is the same.

alan, March 2007
I have exactly the same problem. No hot water but radiators work fine. This problem occured when pressure on boiler was dropping and i had no heating. I have fixed the pressure with a new part and radiators are now ok but hot water has not returned.

Have i built in the fault and how can it be fixed?

Tom March 2007, March 2007
It is either the diaphragm,microswitch or thermistor

alan, March 2007
link Click here to see other fixes for Saunier Duval.