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so, what has he done, then, to make the boiler work...? I'm really confused now.

he said it was related to the pump

It was related to the pump, I think he said. I dont think Homeserve have ever had the parts they require in their van - they always have to order them. Very odd indeed.

OK, so today's verdict is that the diaphragm has burst, so a new one has been ordered and will be fitted next week. He has bypassed it in the meantime so we have hot water till then.

Thanks - yes, that's what I've often wondered. It has happened on and off for years now, and usually it starts working again for no apparent reason. But the random reason for it happening (windows open) just makes no sense. Although, as I said, I feel that the pump is now deid, so that will...

Not sure what you mean?

Thanks to you all for your help! Hopefully the engineer will be here soon. The pump now appears to be dead.

Thanks again - I'm just baffled as to why it happens after windiws have been open! Strange.

hmm, thats really interesting - thanks v much!

I dont think they have, no - and could that cause the pump light to flash...?

To be fair, they seem to have no clue, so far! :lol:

thanks for your reply. I get where you're coming from, but I hoped that someone could help on this thread, so I can tell them what could be wrong. It's getting tedious waiting in for repairmen who dont actually repair it! I have just switched the boiler to Hot Water only, and the light didnt...

We have a Potterton Performa boiler. We have had Homeserve out 3 times already regarding this one problem, and theyve attempted various things - none of which have worked. OK, so every day or two the "fault on pump or low system pressure" light indicator flashes. Eventually, the light...