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Ravenheat CSI 85 A (T) Burner Cycling Constantly?

Hi all...

I've got a Ravenheat CSI 85 A (T) combi and shows the following symptoms.

It's fine with HW only, but when using the heating the following occurs. Starts at 1.5 bar and when the heating is turned on, it creeps up to just over 2 bar during the first five minutes. After around 30 minutes the burner starts cycling on/off every 5-10 seconds or so.

The Ravenheat fault finding says either ignition control board fuse (which it's not, as I've checked that) or the gas valve, but mentions nothing about the fan control board, which seems to be mentioned as a cause quite often. It's not the thermistor or PCB as both these have been changed within the last couple of months (yeah, am having good luck at the moment).

And no, I'm not trying to fix it myself, but would like to know if possible which part is required before getting the heating engineer in, as I can save a packet ordering it myself rather than through his company, plus it would be here when he comes, so only one visit to pay for!

TIA

DekHog
November 2009

Ravenheat Ravenheat CSI 85 A (T)Heating, Home Heating Systems Ravenheat Csi 85 Burner

Up to now we've swapped the thermistor, fan control board and PCB and serviced every part possible - still exactly the same... phone Ravenheat about the problem and they say, "Oh, it shouldn't be doing that... "
Yeah, I know, that's why we're calling you! No help from them at all.

Hope you get your pressure problem fixed without spending too much cash! Two gas engineers have assured me that Ravenheat are absolute crap - good fun sitting here freezing running up astronomical electric bills...

DekHog
December 2009

i have same boiler.it had same fault from day 1 i did nothing for 6 months but got fed up with it cycling .i phoned makersand explained problem.they asked for serial number.they told me a batch of faulty components had been fitted to several boilers.they came and changed it several days later.i dont know what it was-sorry.2 1/2 years later and at end of guarantee my boiler loses pressure over 8 hours.it is being lost from the condensate pipe.service engineer is supposed to call on 2 dec.hopefully to fix it

raymondmelvin
November 2009