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After reading all your replies and having already read the FAQ on this subject which stated 1 bar pressure in the expansion tank, I could find no real reason why it has suddenly gone wrong as the plumber said there was good pressure. I obtained a copy of the installation istructions, in there...

I had a similar problem with a cordless room stat, I have ended uo placing it into the dining room but leaving the TRV active else it turns off too quickly. Usually I just rely on the TRVs and have the towel rad in the cloakroom on permanantly.

Hi, I wonder if anyone can give me advice on the problem I am having of varying central heating pressure ? I have a Vaillant ecoTEC plus 937 boiler. Even since installation (3 years ago) there has been a small pressure loss from the system requiring a "top-up" every two to three months. This...