James D Brockton , MA April 10, 2022 Appliance: Whirlpool Gas Dryer WGD4900XW4 Whirlpool Dryer Wgd4900xw4 / : The dryer worked, but no heat. How to replace Dryer Thermal Cut-Off Kit. I wasn’t sure exactly which part it was, so I changed the Thermal Fuse, Thermal Cut-off, and the Gas Valve Coil Kit. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours