DIY Doctor

Central heating wont turn off

Postby 1956brian » Tue Jan 15, 2008 1:21 pm

My boiler is working fine. C/H and Water switch on and off on the timer fine. Problem is that when the room termostate reaches required temp the radiators continue to get hotter.

I can also switch the c/h off from the timer, so hot water only and the readiators continue to get hotter !!

I am no expert but could it be a faulty motorised valve/ room termostate or timer. ??

House is approx 15 years old new pump fitted last year, everything else original.

Any advise would be appreciated
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Tue Jan 15, 2008 1:11 pm


Simply Build It

Postby keitht » Sat Feb 16, 2008 10:57 pm

if the boiler aint shuttin off when upto temp sounds like a thermostat problem
Rank: Apprentice
Progress to next rank:
Posts: 17
Joined: Sat Feb 16, 2008 4:23 pm

Postby uk_ducati » Sun Feb 17, 2008 8:53 pm


if the heating still gets hotter when switched off and hot water is on it will most probably be the motorised valve.
to check get someone to turn heating on and off while watching the valve. if nothing happens ie you dont hear a motor moving you have a faulty valve motor or seized valve.

hope this helps

Rank: Ganger
Progress to next rank:
Posts: 80
Joined: Wed Feb 13, 2008 8:11 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics