Heater Controls 69 A body

if you have the round disc or any similar piece of plastic, Drill and tap #10-24 . Get a brass allthread screw of sufficient length and screw it in. A drop of super glue supstatutes thread locker and done. I've repaired some without removing the disc piece from the assembly since it has to come apart to do so. Some of the stubs can be slightly longer than originals.
Most inportantly, check the doors in the plenum for debrie, etc... They should open and close fairly easy. Hop this helps