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how to fix ravenheat csi primary A boiler?

came off holls boiler stopped working replaced PCB,still not working,comes on for 30 secs then goes out,starts again goes out,tryed new gas valve,no joy manual says it is these 2 at fault,
martin, September 2009
Try the themocouple, that seem's to be your problem.

good luck

Mr Ravenheat., October 2009
link Click here to see other fixes for Ravenheat CSI.