Product pick of the week: Thermal Fuse


Welcome to our new series, every week we will be selecting a new part or product we sell and explaining its use and importance. This article will talk about Thermal fuses which are used for your drying machine. If your dryer is not heating it may be a faulty thermal. 1st Source Servall will explain how this part works and why it is important.

A thermal fuse is a safety part that’s purpose is to shut off the electrical flow that powers the heating mechanism when the exhaust becomes overheated. It is similar to an electrical fuse and it can’t be reset, it must be removed and replaced when it is worn out or broken.


Part Overview:

The thermal fuse is a safety device designed to protect your drying machine from overheating. When the temperature reaches a dangerously high level, the thermal fuse blows and completely cuts off the power to the heater. The fuse is located on the blower housing or the back of the drying machine.



How to use:

The main reason to check your dryer’s thermal fuse is if your dryer is not heating up. You will have to test the thermal fuse to see if it is properly working; it may be broken or worn out. Before testing the fuse with a multimeter tester, make sure to unplug the drying machine. To test the fuse, remove the wires that lead to the thermal fuse and using your multi-meter tester, set it to the Rx1 setting. Test the thermal fuse at room temperature because testing the fuse when it is heated will result in a reading of infinity when you want a result of zero.



Why it’s important:

Thermal fuses protect circuits that reach a preset temperature to reduce electric shock, fire risk, and injury caused by overheating. This part is important because high temperatures can ruin electrical components; it monitors the heat levels and alerts the system. Thermal fuses can read temperature ratings, preset temperature limits and as soon as the drying machine exceeds the preset temperature, the fuse shuts off the power to prevent any damage. This part ensures your drying machine will not over heat and protects your appliance.


The only way to be sure your thermal fuse needs to be replaced is to test them for continuity.  You can find instructions on how to do this here: Does This Part Work? | Using a Multimeter to Test for Continuity. You can also find dryer repair guides & more here: Dryer Help & Tips and any parts you may need on our website.

Did you find this post useful?  Let us know what you thought in the comments.  Be sure to like and share this post, and subscribe to the 1st Source Servall Blog to get appliance tips, repair guides, and more each week!

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