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GaryH · Joined: 07 May 2008 Posts: 1 Location: West Midlands

Hi All Plumbers and Heating Engineers

I have trouble with my central heating, the radiators have started to remain on and hot when the roomstat is turned down and even if the CH is OFF on the programmer. (They are only on though, when the "hot water only" is heating up.

There is a silver coloured box attached to the side of the tank in the airing cupboard with a sprung lever on the front of it, could this be anything to do with it?

AlanE · Posted: Wed May 07, 2008 1:33 pm Post subject:

jenniss09 · Joined: 14 May 2008 Posts: 3 Location: haywards heath

If you have a 3 port valve thats 3 pipes in a T shape all going to a box type valve possibly the central heating port is not shutting off.

If you have this valve, turn on hot water only and feel all 3 pipes, if all are getting hot then this is the problem.

needs drain down and new valve.

vince knight · Posted: Wed May 14, 2008 9:54 pm Post subject:

First thing to do is get a tester and see if the white core in the cable that goes to the valve is live (240v) when the heating is turned off on the programmer.

Vince