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Thanks Tony. I'm getting confused about the terminolgy! Basically I have hot water working when the CH but boiler doesn't light when its set on hot water alone. I think the plumber said get the micro- switch (is that the same as the flow switch you mention?)- local place have the micro switch...

quote="Agile"] In the case of the Alpha boilers its usually the flow switch gland and the diaphragm which fail. The local retail plumber merchant has the kit and switch which will cost £75. I'm led to beleive that this is might be a pricey way of getting just the diaphragm (somene on this...

Need a diaphragm for an Alpha Boiler and can only get a Diverter Valve Repair Kit. Also advised to get the Micro Switch. Have been advised to look online. Any suggestions for websites that supply these parts? Is it possible to get just the diaphragm? Cheers

Thanks for reply. this is first time I have used a message board and so far so good! Before I picked up your message I have this am phoned a plumber found on the TrustMark site. Got a price for supply and fit of the diaphram of £120 + Vat (but it could need something else......!) Was told if...

Just found this message board - great. Got to find and call a plumber tomorrow and was dreading it. Alpha boiler not giving out any hot water when just set to HW and has been luke warm when on CH . Looked on this mboard and found a similar Query and answer 14 dec \\\' Sounds like the DHW...

Just found this message board - great. Got to find and call a plumber tomorrow and was dreading it. Alpha boiler not giving out any hot water when just set to HW and has been luke warm when on CH . Looked on this mboard and found a similar Query and answer 14 dec ' Sounds like the DHW...