Thermoquad questions

Bewy said
Some pics would help.

Seems odd that the AV spring would be in the f/bowl. AV would have to be removed [ 2 screws ] to slide the AV shaft far enough for spring to drop out. There is no need to remove the AV during cleaning/maintenance. ??
So check that AV mounting screws are tight.
Click to expand...
I had that happen once. When I was adjusting the airvalve with two screwdrivers (one to hold the inner and outer lock ring) one of them slipped and the spring went "waang". It dropped off & went into the bowl. Probably what happened to his unit as well.