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I think I must have a sealed system then because I can't see a tank anywhere. Sorry for not mentioning, I'm a bit new to this. As far as I'm aware I have the following: - 1) An Ideal Europa combi boiler that switches heat from CH to HW using a 3 junction diverter 2) A series of four...

Thanks, I'll give that a shot. I've got four out of five fine now. This is like a Rubiks cube!

We've got a combi boiler so there's no tank but thanks for the reply.

Thanks, Chris. Much appreciated.

I've been trying to track down the reason that some of my rads are cold but not others. At first it was the same two so I assumed it was the TRVs but I fixed them yesterday and in the process found that it's not always those two. Basically ... 1) Bled rads, no effect 2) Emptied and...

cheers. I'll give that shot.

Thanks, corgiman. Much appreciated. While we're on the subject ... ;) If the flow pipe into the rad is roasting but the the rad's nae is it likely to be the valve or is there another possible explanation. There's no sludge cos I've emptied the rad and refilled it. Other rads are fine but...

We've been trying to hunt down the cause for 2 of our 5 rads not heating up properly. We're now on to checking the TRVs but it looks as if they may not be functioning properly. I have two questions: - 1) when we pull out the pin, should water from the rad be leaking out? If not, what could be...