Warm air boiler booming when ignites Information, help and advice on many gas related subjects from gas fires to domestic appliances

[spinkox]

My father has a Lennox Duraglass G11 warm air heating boiler and occasionally when it ignites it makes a massive boom. I thought he was exaggerating til I heard how bad it was. He has had an engineer around but it has never been solved. Any ideas??

steve

[DEEARR2]

Had similar problem with a Lennox Unit. Fault was caused by delayed ignition where the main gas was not getting to the constant pilot quick enough and causing a build up. Finally modjfied the unit by relocating the pilot assembly into the centre of the main burner bar. No explosions since.

[htg engineer]

Possibly just needs the pilot cleaning, if the gas valve opens and the pilot flame is poor = explosive ignition.


htg

[spinkox]

Thanks. . .

It has been looked at by an engineer so I suspect the pilot is clean but he has run out of ideas. How easy is it to relocate the pilot assembly to the centre??

steve

[DEEARR2]

The modification is quite simple. If your engineer buys a 6mm Bundy kit,
which comprises of a length of 6mm soft alloy pipe and a selection of fittings, it is then a matter of re-location of the pilot assembly with a couple of screws and repipe back to the gas valve. GSR engineer is a must.