Boiler OK for water but turns off after 6 secs with Heating

Postby SteveDeal » Thu Apr 19, 2007 3:22 pm

I've an old Glow Worm 50B boiler which functions OK when heating the water i.e. pilot light runs, main burner comes on and off as required. However when switched to the heating the boiler fires up, runs for 6 secs and then there is a big 'solenoid' click and both the main burner and pilot light go out. The pilot light can then be re-lit manually and run quite happily so I'm assuming the thermo coupling is working OK. Any ideas?
Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Thu Apr 19, 2007 3:12 pm


Simply Build It

Postby DONFRAMAC » Sun May 06, 2007 12:30 am

This looks like an over-temperature trip, such as would be caused by no-flow thro' the radiators. This could be due to a malfunction of the diverter valve;-- they can stick or wear out, or burn-out;-- not an expensive job;-- you could manage to fit a new motorised actuator yourself, or manually exercise the valve stem with the motor head removed. Any water leakage from the valve gland means a new valve, and a plumber to do the work due to the draining/refilling/priming/fresh anti-corrosion protection chemicals.
Rank: Ganger
Progress to next rank:
Posts: 195
Joined: Fri Mar 30, 2007 5:52 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