DIY Doctor

No power to pump

Postby sshaw101 » Wed Nov 04, 2009 5:09 pm


I have just changed the pump to our central heating system, thinking that this was the reason why we were not getting any hot water or heating. I was wrong.

The boiler fires up and stays lit for a few minutes then as the pump is not circulating the water it switches off. However the pump does not start. The guy who chnaged it said it appears that no power is going to the pump. We dont think it is the motorised switch valves as neither hot water or heating works.

Any ideas?

Thanks in advance
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Wed Nov 04, 2009 4:44 pm


Simply Build It

Postby plumbbob » Thu Nov 05, 2009 9:04 pm

The motorised valve controls the pump so if it is faulty then the pump won't work at all.

Because you have not described your system in any detail it is not possible to be more precise! After all, I cannot simply guess?
Rank: Project Manager
Posts: 1891
Joined: Wed May 07, 2008 9:59 pm

Postby sparx » Fri Nov 06, 2009 2:40 pm

Hi, although the valve output controls the pump it normally does so via the boiler since most boilers require the pump to 'run-on' after boiler shuts off, similar to fan in WC running on after light turned off.
So problem may originate at boiler control board.
Rank: Project Manager
Posts: 2166
Joined: Wed Mar 21, 2007 8:33 pm
Location: The fifth continent.

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