I have taken a large cable tie – it’s a big black one, about .5″ wide and 24″ long and daisy chained a series of ‘swiffer duster’ pads long it, and run it repeatedly under in the narrow gap between the bottom of the ceramic flame arrestor and the drip pan.
I also broke down today a bought a long condesor coil type brush rammed than thing into the gap and tried to get things clean. I don’t know if either method worked well enough to clean anything, but it seemed to work.
I also took several nuts and spaced them along the warped base plate to try to facilitate better air flow inside the air chamber. It was warped like a ‘cookie pan’ like other pages have suggested in these pages, but I tried to achieve the uniform 1/2″ gapping suggested.
Still the same problem. Runs for a while, then shuts off. I appreciate the help, no matter the frustration I’m having