Help with potterton combi boiler bangs when cooling down

[oz-plumber]

Gas valve not shutting off completely?

Some manufacturers claim this as: Parasitic Gas Valve.

Gas valve continues to pass gas when appliance should be shut down, causing flame to continue.
The boiler thinks the gas valve is shut, but the burner keeps going because their is gas available.

See if you can see if the burner is still alight when you turn the hot water tap off

 

[Lou]

Did you get your problem solved? If so, how?

 

[jonkaw]

Did you get your problem solved? If so, how?

No it still does it randomly but mostly when boiler is off/cooling down... just putting up with it

 

[Lou]

No it still does it randomly but mostly when boiler is off/cooling down... just putting up with it

Oh that's a shame. Some of our other members might have a few ideas. Nothing worse than random noises!