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Thanks to everyone. All sorted. It was as stardanny had suggested. For some reason the flexi hose must have been taken off when the boiler was moved and then put back on the wrong part of part of cold inlet. Swapped around and all working fine :)

*b___dy spell check: piped not pipes and find not fund. Ps house is in Brighton

Didn't intend the wind you up bunnyman - hope you've got your sense of humour back. I have been holding out for someone to say what they thought the problem was in more detail than 'it's pipes wrong' after an earlier idea in this thread that the hot and cold pipes were round the wrong way...

Thanks! I'll have a go. Family getting wound up so if I can't sort easily I be back for phone numbers. Anyone local to Brighton?

Ok thanks guys. Will get insurance next time. Meanwhile it works like this (see pic) for about 8 hours. Then the pressure rises too far and I have to open the tap that is used for topping up the rads and close the 'mains in' tap (see earlier pic). With any hot tap on, this reduces the pressure...

Thanks for replies. I woke this morning to a cold house :(. Checked boiler, and even with the filler tap fully closed (on left as looking from front), the pressure had crept up to 3.0 bar shutting the boiler off - error 75. No problem as I'm plenty familiar with how to get the pressure down...

Hi 831 Bunny, I'm just down from the loft space after fiddling around with those grey knobs. I've managed to get things working by turning the grey knob where the cold comes in, to part way. Sounds odd but with it fully open, nothing comes out of the hot taps. When it's part open (and with the...

Just checked official installation documentation and the label is right and the boiler is plumbed the right (page 20 of http://www.vaillant.co.uk/mediaarchive/2013/10/ecoTEC-installation-servicing-2-2005.pdf). Perhaps I've just opened the valve that needs to be closed and closed the one that...

Actually forget all that viewed from business. I'm not making sense but I'm sure you'll figure it out. My theory is that someone put the label on the wrong way round??

Thanks again gazdaz36 and bunnyman, I think you're both right. Before I swop hot and cold pipes around can someone confirm from the picture attached that the cold IN should be the plain copper pipe to the left of the central chrome gas pipe (not as the order in the label) and that the hot OUT...

Thanks. I'll be back tomorrow to take a proper look - it wasn't me that plumbed it in btw - but I know enough to swop hot and cold around. If it's not obvious to see, please let me know any pointers and how to check which outlet should be for hot and which for cold. Isn't there just a cold in, a...

Ah, that is actually a possibility!!! Thanks I'll check.

hi I've read through all the questions and responses but not found the same issue that I have. Basically all was working fine when I bought the house, but after relocating the boiler, to the attic (this may not relate to the problem btw), I found out that when I use the hot water, the pressure...