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Many thanks I'll give it a go.

I have an Ariston Euro Combi Boiler SX20. I have had an on going problem with my hot water only working when the heating is on. I have changed the diaphragm on the diverter valve and checked the triple micro switch on top of the diverter valve. I have now noticed that opposite the diverter...

I'll give that a go. I havent got a meter but I'll get one from work on Monday. Thanks.

The pin rises up enough. Yes a new cap was put on.

I have an Ariston Euro Combi Boiler SX20 MFFICE The hot water only works when the heating is on. I have changed the diaphragm but this has made no difference. When I switch the micro switches manually the boiler fires up but when the hot water tap is turned on nothing happens. The pin from...

I have searched and the common thing seems to be the diaphragm. I noticed that kevplumb has a manual, any chance that you could send it to me. I ve mailed you. Many Thanks. Garry.

I have an Ariston Euro Combi Boiler SX20. When the boiler is set on hot water only sometimes the hot water works other times it just runs cold. When the boiler is set to heating and water it works fine. Any ideas, please help.