Dean D Rogers , AR December 12, 2016 Appliance: Whirlpool Undercounter Dishwasher DU850SWPS3 Whirlpool Dishwasher Du850swps3: Heated dry would not work. How to replace Thermal Fuse. Tested the thermal fuse and it was bad. Decided to replace both the element and fuse to prevent further issues. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes