One type of PTAC I deal with, continuously get spiders in the venturis, blocking the gas/air flow.
Is this a Fabreze moment? C.Y.D. I'm voting white elephant. 2¢.
Have only seen it a couple of times.
It wasn't in the flue it was in front of the main burner orfice of
Waddya mean don't thaw out the frig with a knive?