Dryer turns on and then shuts off, or won’t turn on

I have a Whirlpool LTE6234AN2 stackable dryer.

I have cleaned all the lint out of the unit, lint screen and housing, but the dryer keeps shutting off after 5-10 mins.

The drum turns and the heating element gets hot, but then the whole thing shuts down after a few minutes.

It will not turn on in “air fluff” mode. It hums when I push the start button like it wants to come on, and then it stops, doesn’t turn on, and if I push the start button again too soon, it doesn’t even hum to try to turn on.

thanks.