Alpha240e boiler Air pressure neon lights

1 Mar 2010
Reaction score
United Kingdom
Hi can anyone help?

I have a Alpha 240E boiler. When I turn the selector to hot water and radiators the boiler fires up and the radiators get hot. When I turn the hot water tap on I get hot water and when I turn the hot water tap off the boiler turns off. The air pressure neon light stays on and the boiler will not light up again. I have replaced both diaphragms, one in the DHW flow valve and one in the primary flow valve. This has not solved the problem. Any suggestions please.

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