Pulsating combustion chamber flames

[Steve weightman]

Has anyone experienced a boiler with pulsating flames in a combustion chamber I've serviced a baxi megaflow system boiler today with the analyser readings saying wtf and could hear the irregular flame noise.
Thanks

 

[ShaunCorbs]

whats your mix like? / the figures

 

[Steve weightman]

whats your mix like? / the figures

700ppm/ 0.0065 the analyser said no lol but I can hear the gas valve buzzing so maybe thinking dodgy solenoid

 

[ShaunCorbs]

if its pulsing sounds like its hunting for air so maybe over gassed whats bp / gas rate?

/ have you checked your flue integrity

 

[Allgoode]

Fan sealing poss, had that on an old W.B. 26 cdi extra for my sins.
One of the old boys had a chuckle & told me about needing perfect sealing which is not easy to see sometimes,
Cheers,
Andy

 

[Darren Jackson]

What were the min & max CO2 readings? And did you fill the condense trap back up after you cleaned it out?

 

[Steve weightman]

if its pulsing sounds like its hunting for air so maybe over gassed whats bp / gas rate?

/ have you checked your flue integrity

Hi the inlet pressure being 21mb but the burner pressure is bouncing and the flue is fine . Thanks

 

[AMGasServices]

@Steve weightman I sound the gas valve needs setting up. It should have the same gas valve as a 24i junior.

 

[Steve weightman]

@Steve weightman I sound the gas valve needs setting up. It should have the same gas valve as a 24i junior.

Hi the gas valve was buzzing big time so got it down to a dodgy valve . Had a job with new one it's settings was way out my fga locked out instantly i expected to set it up but not to the extent the burner was blowing out