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I now know the boiler is a Concord WRS 240B. I take it that doesn’t change anyone’s opinion? Thanks again.

I was worried you were all going to say that. About £2.5k for a new boiler then! Thanks for the advice.

Hello, looking for advice please about a balanced flue. I am buying a house with a boiler that has a balanced flue (don’t know make / model right now but can add later). I want to build a shed near the wall that the flue comes out of, as close as possible, so much closer than the 600mm that...

Ok, thanks for the suggestions. I will update you in due course.

I have not actually seen water going into the tank from the overflow but I have replaced the ballcock on the cold water feed (made no difference) and the water in the tank gets warm. Is there any other way this could happen other than from the cylinder expansion ? There's no pump for hot...

Hugh Jaleak, I'm hoping it's not a leak in the coil for obvious reasons! If there is one I think the overflow would run more than it does. Recently it has gone for weeks with no leaks at all then started again when the hot water ran out one day. It seems to be all or nothing.

Thanks for the suggestions. To confirm kbdiy, there is no problem with the F&E (central heating ?) tank. the top of this is significantly lower than the CWS tank.

They are at the same level, both in the loft. If the coil is split, wouldn't it pressurise the tank when it's hot as well as cold?

Apologies that this topic has been covered before but I haven't found symptoms the same as mine in previous posts. I have a Potterton Promax boiler, about 10 yrs old I think. This seems to work fine, heating the water and rads via a 3-way valve. The problem I have is that the cold water tank...

My boiler has recently started shutting down after running for only a minute or so then restarting after less than a minute. It does this continuously when heating hot water or rads. The pilot goes out then re-lights itself. The system pump is running as normal, and the boiler heats rads and...