DIY Doctor

Combi Boler too much pressure

Postby ton toN » Wed Jan 09, 2008 7:25 pm

I have a Sabre 24 Combi Boiler, the pressure is up around 3.5 bar and the relief valve is constanly dripping. Even with the top up pipe disconnected the pressure goes back up to that pressure after it has been bled.

I suspect the heat exchanger, is this fairly easy to replace ? Not very happy as the boiler is less than 3 years old!

ton toN
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Wed Jan 09, 2008 7:20 pm


Simply Build It

Postby htg engineer » Thu Jan 10, 2008 7:33 pm

Turn off the cold water supply to the boiler and run the heating if the pressure still rises to 3.5 then it's a problem with the pressure vessel.

If the pressure only rises with the cold water to the boiler is turned on then it could the plate heat exchanger is corroded.
htg engineer
Rank: Project Manager
Posts: 3256
Joined: Tue May 22, 2007 5:22 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