How to Fix the Thermal Fuse for a Dryer That's Not Heating

If your dryer isn’t heating at all or enough, it could be an issue with the thermal fuse within your dryer. This device functions similarly to a hi-limit thermostat, in that it regulates the internal temperature of your dryer. If the airflow within your dryer is increasingly restricted, the temperature will also rise. This fuse is used as a last resort for your dryer, if it has one, to be a sign that there are further issues with your dryer than a simple part issue. The thermal fuse does not reset itself like the thermostat does, so if it has been used, it means that it will need to be replaced as soon as possible for your dryer to operate normally. If your thermal fuse has blown and you replace it, make sure you thoroughly clean your dryer and its venting and lint filtration systems to address any underlying airflow issues. Our guide below will help you figure out whether the thermal fuse is the part causing your dryer’s heating issues. It will also show you how to diagnose and replace it, if it is the root cause.

What is a Thermal Fuse?

A thermal fuse is a safety device that detects if/when the internal temperature of your dryer reaches a certain heat threshold and then shutting off the appliance, stopping operation.

Where is the Thermal Fuse Located?

The thermal fuse is normally attached to the blower vent. On gas dryers, the thermal fuse can also be located near the burner. Refer to the 3D diagram below if you need further help locating your thermal fuse, or consult your model’s user manual for the specific location.

General Location of the Thermal Fuse in a Dryer

How to Access, Remove, and Inspect the Thermal Fuse in a Dryer

Before performing any diagnostic work on your dryer, it’s important that you disconnect any sources of electricity and turn off any sources of gas from your dryer. For this repair you will only need the appropriate socket set, a screwdriver, and a putty-knife.

1. Depending on your dryer’s make and model, you might need to remove the lint screen before making any repair.
2. With the appropriate screwdriver, socket head and putty knife, disconnect and remove the top panel of your dryer.
3. Disconnect the user interface panel and any attached cable/wire harnesses and sensors.
4. Unscrew, disconnect, and remove the rear portion of your dryer. Repeat this step for any vents or lint screens that may be connected at the rear of the machine.
5. Locate your thermal fuse near the heating element, burner, or blower vents, and disconnect it from its housing.

How to Test the Thermal Fuse

Your thermal fuse can be tested with a multimeter, to check for continuity.

1. Set your multimeter to continuity mode.
2. Touch each probe to separate terminals on your thermal fuse.
3. If there’s a visual or audible reading, it means that your thermal fuse can still hold continuity. If not, it’ll need replacing.

How to Install a New Thermal Fuse

1. Fasten and connect the new fuse to the appropriate terminals and screw it back into place.
2. Resecure the rear panel and any necessary cable/wire harnesses.
3. Connect the user interface panel, if it was removed.
4. Reattach the top panel and reinsert any lint screens or vents if they were removed initially. Now your repair is complete!

Next: Troubleshooting the Electronic Control Board

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