Originally Posted by ZachO
By the way, I know how you feel with that fuel filter ordeal...
Oh, no worries, that was 40+ years ago. Actually, I think that in another ten years I'll be over it completely.
But, I did learn a lesson by it; I simply quit doing any preventative maintenance after that (just kidding).
By the way, the washer sounds intriguing. If it serves to establish the position of the jet relative to the orifices in the little burner head, that would affect the air / fuel ratio at the flame. That just might be what gets it out of sorts when there's a very low gas flow.
I had a number of cars that were so old that the steel throttle shafts would wear the boreholes in the aluminum carburetor into ovals. They ran fine at speed, but getting them to idle properly was about impossible as they drew so much air in around the throttle shafts. The ultimate answer was to bush the carb body and restore the close fit which would limit the air admittance.
So, having the burner system on your fridge
work okay on a high flame and not so well at a low flame level seems to make sense.