Betacom 24 cycling in central heating mode

[HeavenlyD]

Hi all, I am working on a Glowworm Betacom 24. The problem it has is when the radiators are hot the boiler will shut down and relight continuesly, on off on off. Hot water is firing fine and stays alight untill the focet is closed. Central heating therminster is working fine, heat exchange is clear, overheat stat is working also room stat works fine and fan must be working as hot water mode is okay. Can any one shed some light on this for me.
Many Thanks

 

[Dotty]

You need a gsr in to look at your boiler. We cannot and will not give advice on the installation or repair of boilers for your own safety.

Please go to Gas Safe Register - Site Maintenance or post a thread in the 'I'm looking for a plumber / gas engineer' section of these forums remembering to include your location. [DLMURL="http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/"]I'm looking for a Plumber or Gas Engineer[/DLMURL]

If you are gsr please increase your post count to 10+ then send a pm to either Gas man or Redsaw who will then check you and then give you access to the gsr private forum.

Thank you.

http://www.ukplumbersforums.co.uk/central-heating-forum/42241-notice-gas-safety-related-advice.html