Ravenheat csi85 - 'burner' cycles on / off

Tharg · 15 Feb 2006

I had a problem with this previously - I had somehow accidentally released the water pressure. Anyway after a but of googling I found the right thing to turn, and got it back up to 1.5. However, now I can't get the heating or hot water to run consistantly hot. The 'burner' (sorry don't know the technical name) just comes on for about 20 seconds, then goes off for a minute or so.

Any help much appreciated!

croydoncorgi · 15 Feb 2006

Probably boiler has air in it, so that it overheats instead of the hot water getting pumped through the radiators. (Water pumps as in boilers will not pump air....)
When you say you 'released the pressure' - did you lose enough water to actually get air into the boiler?

Tharg · 15 Feb 2006

Thanks for the reply.

Quite possibly ... I didn't realise what I had done until afterwards. The botom panel with the knobs and timer etc. was loose and I was putting it back in. I think that the wires behind it turned the safetey release system thing as I was pushing it back in. How should I get the air out of it now?

Edit : anyone with further advice on this? Do a good deed : help a student to have a bath.

Slugbabydotcom · 16 Feb 2006

The automatic air vent should have let any air out. Just a case of checking that the vent cap is left open by about one turn.
My money is on the CH thermistor being faulty. A notorious problem on these boilers and a guilty party in 95% of the cases as you describe. Not a job I would let a student DIY on ... Even a smelly one. Unless you happen to be particularly adept at such matters.

Tharg · 17 Feb 2006

Ok, thanks for the various help. I have a guy (CORGI) coming to look at it early next week.

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Ravenheat csi85 - 'burner' cycles on / off

Tharg

croydoncorgi

Tharg

Slugbabydotcom

Tharg

DIYnot Local

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