How to Troubleshoot & Replace Whirlpool AP6008306 / WP3390291 Hi-Limit Thermostat

FIRST WE PURCHASED A HEATING ELEMENT. WHEN WE RECEIVED THE ELEMENT WE PROCEEDED TO TAKE APART THE BACK OF THE DRYER TO FIND THIS LITTLE PIECE WAS THE PROBLEM. WHEN MY HUSBAND TOOK IT OFF THE ELEMENT IT LITERALLY FELL INTO PIECES IN HIS HAND, PLUS WE FOUND SOME BURNT WIRES THAT WERE CONNECTED TO IT. LUCKILY WE DID NOT HAVE A FIRE. THIS THERMOSTAT AND THE ELEMENT WERE VERY EASY TO INSTALL AND NOW WE HAVE HEAT TO DRY OUR CLOTHES. 

I did kind of use the shotgun method in this repair. I replaced all four of the internal sensors and the moisture bar. I figured with all new sensors, another one of the old ones may have failed in the future and I would be back into it again. I did check the heating coil with my ohm meter and it was fine. This unit is 17.5 years old, it is a Sears Elite Series and I was told worth repairing. It is a combo washer/dryer, so the videos here dont show the proper location of the parts, but they are the same and it takes just a few minutes to orient yourself to finding them all. $175 in parts and it was up and running again and working perfect. I recommend taking pictures before you begin for reference later. The pictures help with the older memory! FEDX was very slow in the parts delivery, so be prepared for that. I also did a lot of cleaning of lint from everywhere in this unit, it is a good thing to do while you have it all apart. 

The Thermal Cut-Off Kit fixed the problem, very easy to install. Removed the bottom front panel, (pops off) removed the fan cover, (two nut driver screws) removed the wires from the heat coil and wires from the Thermal Cut-Off Kit. Removing the heat coil pipe made it easy to remove and replace the Thermal Cut-Off Kit. Never work on a dryer until you unplug it. 

Watched video on you tube. Ordered the part and saved a ton of money by fixing it myself. 

Replaced high heat thermostat and the cycle thermostat. 

Replaced parts I bought thru you 

I replace my dryer heating element it took me five min to do the job. I also replace the themostat , themal cut-off kit & screen; but the dryer heating element was the problem. 

Replace the high temp thermostat