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Well it's due a service which I guess involves shutting the gas off anyway so I may as well bite the bullet... :)

No, I haven't. I did change the diaphragm a while back and it's not been long since I had the differential valve off and cleaned it up. I mistakenly thought the boiler wouldn't fire up if that wasn't working properly as that's the problem I had once before...

Well I first replaced the temp sensor and nothing changed. I then struggled massively to get the plate heat exchanger out, there was just no space to get it out. I ended up taking the cold water feed and the whole inlet manifold off just to get the thing out! I'm certain this shouldn't be the...

Thanks for the reply, and telling it how it is! I wondered at first if I was just unlucky with a dodgy one but it does seem they are just rubbish! Anyway, I will try those suggestions and see how I get on. To be fair, the installer KA was fantastic and did extra work for nothing, it's just...

Hi I'm so sorry if this has been asked before. I did a bit of a search but came up with nothing exactly like this. When I turn on a hot tap I get the store of nice hot water. The boiler IS firing up, I have replaced the diverter valve diaphragm previously when it wasn't firing up. It was...

Just an update for you as I promised I would. I have fitted the diaphragm and PRV and I now have lovely hot water on demand and the boiler is keeping pressure, hooray! :D So thanks very much for your input guys, I'm very grateful! Cheers Terry

Just tested the EV, when I pushed the pin in on the valve air came out so I'll take that as a good sign and keep my fingers crossed :) PRV and diaphragm ordered and cheaper than even I hoped, only just over £17 inc delivery so like I say, I'll let you know how I get on....

Well that's great. I hope I don't have to do it of course but if I do then that looks cool. More preheated water would be great too as it's never quite enough to last until the on demand water gets to the tap. I'll keep you posted how I get on (just in case you might be interested :))

Thanks for the info. I've found a supplier of the parts and checked out how to fit them, looks like no worries there (famous last words!). Having looked around, I really, really hope that the Expansion Vessel isn't knackered as it looks like that'll be out of my hands with the whole boiler...

Hi Thanks for the response, I'll try the PRV for the pressure problem. Like a putz, I forgot to say something on my post. When the preheat fires and the DHW LED comes on it's the CH valve pushrod that pops out, the DHW pushrod doesn't budge. When I depress the DHW microswitch, the DHW LED...

Hi guys Well we've had this problem for months now, we don't have two pennies to rub together so we've put up with it but hopefully I can progress it now and I can have a crack at fixing it...... We have a Baxi Instant 105e that won't keep any pressure, we have to top it up literally every...