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My name is Peter. I am a retired field service appliance technician.
Thermal fuse 3399849 trips if the exhaust air leaving the dryer becomes too hot.
Unplug the dryer before installing the thermal fuse. Wear work gloves to protect your hands during this repair.
This Dryer Thermal Fuse part #3399849
This is located in the back of your dryer on your hot air exhaust manifold.
If your Kenmore dryer has stopped producing heat, chances are the problem lies with the dryer's thermal fuse. A fire-prevention safety device, the thermal fuse is designed to disrupt the flow of electricity to the dryer's heating mechanisms if the dryer temperature reaches a predetermined maximum. Once activated, the thermal fuse must be replaced to restore the heat to your dryer. In Kenmore brand residential dryers, the thermal fuse will be located in one of two places.
Front Panel Access 1 Unplug your Kenmore dryer from its power source. Make sure that the appliance is unplugged before proceeding. 2 Use a flathead screwdriver or putty knife to remove the dryer's bottom service panel, sometimes called the toe panel. Slide the screwdriver or putty knife along the top of the toe panel until you've located the toe panel clips. The clips are usually located about four inches in from either side of the service panel. Push down on the toe clips with the screwdriver or putty knife to release. Remove the panel and set it aside.
3 Locate the thermal fuse on your Kenmore dryer. Look for the thermal fuse directly above the dryer's motor; it looks like a white strip with two wires, and is usually mounted off to one side. See Resources for a diagram of thermal components. Rear Access 4 Disconnect the Kenmore dryer from its power source while locating the thermal fuse. 5 Move the dryer away from the wall so that you can access the back of the appliance. 6 Use a screwdriver to remove the dryer's back panel. Set the panel and loose screws aside until you are ready to replace them. 7 Locate your Kenmore dryer's thermal fuse just above the exhaust port. The thermal fuse looks like a white strip with two connected wires.
Tips & Warnings
Clogged exhaust ports are a common cause of thermal fuse failure. While you've got your Kenmore dryer in pieces, clean out the exhaust ducts to keep it functioning at its best.
Take all proper safety precautions when working with electrical appliances. Make sure that your Kenmore dryer is unplugged before attempting to service it.
Check this link ,if you use Whirlpool Dryers: http://www.do-it-yourself-washing-machine-and-dryer-repair-help.com/thermalfuse-dryer-Whirlpool-29inch-electric.html
Thermal fuse. If the dryer overheats, this device stops the flow of electricity to the heat source and/or the entire dryer. It is located on the blower housing and cannot be reset. The most common cause for overheating is a vent tube clogged with lint, a birds nest or other debris.
This is the most common locations for thermal fuses and heating element on Whirlpool,Kenmore,Estate dryers. Check these fuses for continuity and replace the one that does not have continuity YOu may also need to check the fuse block again it takes two fuses to run the dryer