Tom -
Good question. The machine does have a "check lint screen" LED; however I see no reference to any kind of sensor in the schematic on the tech sheet. Given that this tech sheet also directs you to diagnostic test #'s that don't exist anywhere else in the tech sheet, and the fact that _something_ must trigger the LED, I'm assuming there must be a sensor somewhere. I'm guessing it's somewhere near the lint screen? (Stupid question perhaps.... but this model has to win some sort of prize for most expensive/most badly designed appliance in the universe. Oh wait a minute - my lennox furnace already got that prize (but that's another story).
Any guidance as to where to look for the lint sensor would be appreciated.
P.S. for Jeff -
Heat thermistor checked OK.
Also, I'm in side talks with Kumar via email - his dryer is still malfunctioning. I'm thinking of starting a support group for people who bought this model.