How to Replace a Dryer Thermal Fuse
The thermal fuse is a safety component that trips if the air flowing through the dryer drum begins to overheat. A blocked exhaust vent is the most common reason the air overheats. When the thermal fuse is blown in an electric dryer, the controls light up but the drive motor won't run. In a gas dryer, the burner won't ignite. You can't reset the thermal fuse; if it's blown, you have to replace it with a manufacturer-approved replacement part. To replace a dryer thermal fuse, follow the step-by-step instructions in this dryer repair guide.
Less than 30 min.
Before you begin
Wear work gloves to protect your hands.
Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.
Step 1: Shut off the power
Unplug the dryer to disconnect electrical power.
Step 2: Remove the back panel
Move the dryer forward and use a 1/4" nut driver to remove the screws from the back panel. Remove the back panel from the dryer and set it aside.
Tip: While you have the back of the cabinet open, vacuum lint and dust from the cabinet.
Step 3: Remove the fuse
Pull the wires off of the thermal fuse. Remove the mounting screw using a 1/4" nut driver. Pull the fuse off of the blower housing.
Step 4: Install the new thermal fuse
Position the new fuse and secure it with the screw. Push the wires onto the connection spades on top of the new thermal fuse. It doesn’t matter which wire goes into which terminal on the thermal fuse.
Step 5: Reattach the back panel
Position the back panel on the back of the dryer. Line up the mounting screw holes. Insert the mounting screws and tighten them firmly.
Step 6: Plug in the dryer
Plug the dryer into the wall outlet to restore electrical power.
Step 7: Clean the exhaust vent
To prevent the thermal fuse from blowing again soon, remove the flexible vent in the back of the dryer and clean the inside of the flexible vent hose. Clean the air duct going to the outside of your home with a duct cleaning brush. Vacuum the area to clean up dust.