After a failure of the LR furnace I had to remove the furnace and do a lot of disassembling of the blower and heat exchanger just to find the dauber nest. It actually fell from the blower fan housing. It must have been blocking the sail switch because I seemed to have pretty good flow, even with the nest in place.
Anyway, the furnace got a good cleaning and I'm sorry, Mr. Suburban, but my newly installed screens are staying, whether you like it or not. I'm sure you don't recommend dirt dauber nests either. You just don't know they are there until they shut you down.
