Strong>>Your own Clue...
Hey Man,
A Kenmore/Whirlpool moves some air.
The Shorter the duct work, the better; if it's going to be over six feet, it should increase in diameter, to allow good venting.
Too long a duct, without increasing the diameter tends to make the air flow try to speed up too much...(like in HVAC ducting).
Now, although you checked, just for reference, A whirlpool will run with a plenum full of dust inside the blower wheel...makes the same noise, turns just as fast, or faster, but moves NO air to speak of...
One of the most important things customers overlook on the pull-out top mount filter...they load the dryer, hit start...and remember,
Shit! I need to clean the lint...
When you pull out a Whirlpool running, you open yourself to the chance of rolling the lint right off the screen down into the plenum...I have several a month come in this way.
Now, you are your own detective...no hose should blow up, or expand like you mention...way too much back pressure...
Just slide the old girl out a foot or two, drop the vent @ the dryer...screw the window deal...and run a load of wet towels...
A Whirlpool on high will dry those in a little over 20 minutes with an unobstructed duct. Period.
I highly doubt any sensor is bad...but use the timed cycle on high...
A Whirlpool can run with the element on for up to 8 minutes before it cuts off for the first time.
You can probably find an angle to view and see the heat glow without even removing the back...just turn out the lights Man!
Good luck, report back.
LaVidaBoem
Post Script: If you are worried about a little lint for this test...use one leg of a pair of panty hose...Slip on duct @ dryer.
Excellent Temp Filter...