phil
New Member
Posts: 3 
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Post by phil on Oct 13, 2013 8:26:09 GMT -5
Hi, just wondered if anybody ever heard loud banging when boiler is firing, sounds a bit like an explosion. Itisan open vent 185 about 10 years old.thanks phil
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Post by sandy on Oct 14, 2013 7:59:31 GMT -5
i have same problem and was visiting this site today to try and get solution
British Gas engineers cannot trace fault and trying to sell me new boiler
i too have open vent 185
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phil
New Member
Posts: 3
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Post by phil on Oct 14, 2013 16:11:04 GMT -5
British gas will always try to sell a new boiler, what were they suggesting though that would give similar performance for mains power hot water. Hope mike has some advice with this problem to pass info onto local gas engineer.
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Post by Matt on Feb 19, 2014 8:01:39 GMT -5
Hi anybody have any idea with this mean has just started doing the same .
Cheers matt
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Post by Mike the Boilerman on Mar 7, 2014 6:54:08 GMT -5
This sounds like 'explosive ignition' to me. I've heard the 185 is particularly prone to it but I've yet to encounter one doing it myself, so I'm not really sure why it happens on the 185 specifically. I'd be checking the spark gap and burner pressure for correct values, then replacing the ignition lead and control board.
Mike
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Post by florry on Mar 10, 2014 13:40:10 GMT -5
Hi I had this problem a couple of years ago and signed up to British Gas boiler care and got them to fix it a month later ! Im not exactly sure what it was but they replaced a round metal disc in the boiler if that helps, looked quite insignificant when the spare part arrived so couldn't have cost much ?
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Post by Mike the Boilerman on Mar 11, 2014 7:31:34 GMT -5
That's interesting Florry, thanks for posting this. I have no idea what that disc could have been! How big was it, roughly?
Thanks,
Mike
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Post by tony on Jan 31, 2018 6:47:56 GMT -5
my 185 has just started ''shotgun''effect,since i treated it to a new pcb and electrode and lead.
anyone any ideas, its never done this before,but seems like a lot of people are the same , cheers , tony
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kenny
New Member
Posts: 1
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Post by kenny on Jun 25, 2018 5:05:50 GMT -5
powermax boiler 185 has recently started making the explosive bang as described in previous posts, mike has suggested a heating engineer to check the spark gap and burner pressure for correct values, before replacing the ignition lead and control board. Are there any other checks or tests to be carried which are related to the cause of the explosive bang.
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Post by icicle19 on Sept 23, 2019 14:19:55 GMT -5
We had this explosive ignition on our 185. The engineer said it was the spark gap had got too big on the ignition electrode, reset that and it was fine. Apparently gap should be about the thickness of a pound coin ? He wasn't impressed with the quality of available replacement electrodes, apparently they're very poor compared to the original ones.
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Post by Tom on Jan 15, 2021 14:48:39 GMT -5
Hi all. This thread helped me when my boiler was banging recently.
Replaced the firing electrode with a new one and boiler is all good with no banging. There was a lot of wear on the original electrode, I was surprised it was firing at all before it was replaced.
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