Central Heating intermittent problem

Postby wine » Tue Nov 23, 2010 7:05 pm

I have a Worcester Greenstar 30CDi and a Drayton Digistat RF3.

Recently an intermittent problem has started.

Sometimes, when the flame appears on the RF3, the boiler does not turn on. Sometimes, it works as it should.

I've taken the RF3 so it's close to the SCR and moved the temperature so that that there is a demand for heat. The red light flashes as it should, then the green light comes on on the SCR. Sometimes the boiler fires up, sometimes it doesn't.

It's completely baffling, as it has been working perfectly for over 4 years, and I haven't changed any settings recently. The DT20 programmer on the boiler is set to "On" and the hot water is working perfectly.

Interestingly, the overide button on the SCR doesn't work, and has never worked.

I have turned the power off to the Boiler/SCR, and it seems to work after it's initial set-up, then it goes back to working intermittently.

I haven't recommisioned the wireless unit to the SCR as it appears to be working OK.

It seems that sometimes, when the demand for heat is sent to the SCR, it doesn't pass the info to the boiler.

Any ideas?

Thanks for any help.
Rank: Labourer
Progress to next rank:
Posts: 2
Joined: Tue Nov 23, 2010 6:28 pm


Simply Build It

  • 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