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plumber is a generic term i used. the chap's company is actually gas and central heating. what i am trying to find out is it possible for a competent engineer to distinguish a fault between a valve and a programmer

He fitted the whole valve and actuator. It was quite an old valve and we had to part drain the system to fit the new one......the new one wont need a system drain on replacing. Nothings changed on the system.......the problem came up a couple of months ago but we left it because we didnt...

I had a problem with the central heating. The radiators would come on whenever I selected hot water only on a Honeywell 699 programmer. The corgi-registered plumber diagnosed a faulty three point valve which he replaced for quite a lot of money. Unfortunately the problem is still...

thanks for your replies yes it probably is the warmer weather........the boiler is not working after switch off but the radiators are taking longer to cool. re the hot water/central heating coming on at the same time......i think its all pointing to the three point valve...

the lever on the head moves freely from side to side - there is no resistance at all. re the boiler staying on................i switched off the controls last night but the radiators were still hot 45 minutes later

Hi I have a Honeywell ST699B 24-hour central heating controller with separate heating and hot water controls, and a three port valve system. Unfortunately of late, I cant put the hot water on on its own........the radiators always come on as well. What is more, sometimes the radiators...