How to Troubleshoot & Replace Whirlpool AP3874047 / 280148 Thermal Cut Off

Replaced the heating element, cutoff-tml, & thermastat. 

New door hinge on washer. Replaced the cutoff-Tml on dryer. 

Replaced heater coil and thermostat. 

Had to replace dryer heater coil. At the same time, I changed out all the fuses that were involved in the heating process. Cleaned out all the lint that had collected in the bottom of the dryer over the past 5 years or so and there was a lot of lint.Replaced dryer vent to the outside of the house as the old vent was metal and had lots of stuck on lint inside it. Was easier to replace than to clean. The personnel at Appliance Parts Pros were a great help in completing this process. 

Ordered the needed parts from you, along with a new lent vent. Watched a how to video .. took dryer apart, added new parts, out it back together .. works like a charm 

Replaced heating element and thermostat. Job took about thirty minutes not too difficult. Dryer is working fine now. 

Replaced the heating element and Cutoff-Tml. Works great again thanks so much 

Replaced thermistor, thermal cutoff and heating element in about 15-20 minutes. 

Dissembled dryer and cleaned and lubed (graphite) all rollers and idler pulley. That lasted about a day and the squeal noise returned. Had to break down and buy a kit with new rollers/idler pulley/belt. As I was at it I figured it wouldn't hurt to replace the heating element. I read online if you replace the heating element, you should replace the sensors as well, so I did. All is good now. Parts were reasonably priced and shipping was fast. Repaired our dryer within four days doing it myself. Sure beats having to wait for a repairman to come out. Our dishwasher is currently broke down, under warranty. The repairman has been here three times, tomorrow will be the forth. We've waited two weeks in between visits (ordering parts, not fixing it the first visit, ordering more parts, etc.). It's been two months since our dishwasher has worked. The moral of the story - if you're mechanically inclined, repair it yourself. 

Appliance Parts Pro came to the rescue. Entered my model number and found the parts I needed. Had the parts in two days and dryer is working great. Had to replace both thermostats on the heater housing.