Ideal Icos boiler fires up and Bangs

3 Dec 2006
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United Kingdom
Hi, we are regularly getting a "Bang" from our ideal icos boiler when it fires up. The boiler clicks to indicate its about to ignite and then "Bang" it sounds that there is a build up or to much gas being ignited?? It does not happen every time but seems to be getting more frequent. i just hope the problem is not dangerous The house and system is only 2 years old and the boiler was serviced after the first year.
Any assistance would be appreciated. Ian J
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it sounds like a blocked condensate trap to me

get it serviced ASAP
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Ignition electrodes. Book a RGI and advise what boiler it is and that it will require ignition electrode and probably burner earth pins then have it properly serviced too.

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