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All fixed; it was the water flow switch (dry fire protection); it would seem that I didn't need a new switch but to simply remove it and clean it of debris. The switch uses a hinged magnet to operate a magnetic reed switch and the magnet had iron oxide debris covering it, which affected the...

Had an engineer out today and he did a combustion check and all was fine. After some puzzeling and testing we discovered that dosconnecting the water flow switch caused the same lock out scenario, so it looks like a intermittant fault of the water flow switch. Just thought I'd let people...

Strike that once the gas gets going there is a yellowly burn to it.

One thing I don't understand though; if I have a gas flow issue of some kind how come when I reset it it fires up instantly and runs as if nothing is wrong with a clear strong blue flame? I guess I would have expected this kind of issue to cause a constant issue instead of a lockout after a...

Cheers Mr W; couldn't find the post you were referring to as its all a bit vague; could someone PM me their ideas. I will definitely get an engineer to do the work, just would like to find me a good one, as the few I have met haven't even serviced the boiler properly so far :( , but reading...

Hi Agile, well I assume it is locked out and the reset switch clears this, but the bolier literally has no feedback indicators so hard to say. I am happy to work on the electronics but as you point out only a qualified gas safe engineer should touch the gas systems. Can you give me an idea of...

Ok I'm stumped... My Potterton Promax HE 24 (Heat only) boiler started becoming unreliable with it starting to fire up less often without using the reset switch on the front. It has now basically got to the point where it won't fire without a reset or unless it has been on recently. Once...