Beatrice Lang
Electric dryers, like many other appliances, have a thermal fuse that protects the appliance from overheating and causing damage to the motor or other sensitive components. This safety device is designed to blow or trip when the dryer gets too hot, interrupting the voltage and preventing power from reaching the motor and heating components. A blown thermal fuse is a common reason for a dryer not heating or starting, and it must be replaced as it cannot be reset or reused.
| Characteristics | Values |
|---|---|
| What is a thermal fuse | A small part in the dryer that prevents overheating |
| What does it do | Shuts off the dryer when it becomes excessively hot |
| What does it look like | A tiny rectangular piece with two wires sticking out |
| Where is it located | At the back or bottom of the dryer, near the heating element |
| What to do if it's blown | Replace it with a new one |
| How to prevent it from blowing | Clean the venting at least once a year |
| How to test if it's blown | Use a multimeter to measure resistance |
| Where to buy a replacement | Repair Clinic, Sears Parts Direct, etc. |
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What You'll Learn
How to know if your dryer's thermal fuse is blown
Every dryer made since the 1980s has a thermal fuse, a small, rectangular safety device that trips or blows when the dryer gets too hot, shutting off power to its heating components to prevent fires. If your dryer is not heating up, it may be because the thermal fuse has blown and needs to be replaced.
To determine if the thermal fuse has blown, you can test it with a multimeter. First, make sure the dryer is unplugged. Then, use the multimeter to measure across the element. If the meter display shows zero Ohms of resistance, the fuse has electrical continuity and has not blown, indicating that another component in the dryer is likely defective. If the meter display shows no significant change, the fuse has no continuity, which means it has blown and will need to be replaced.
If you do need to replace the thermal fuse, it is important to purchase the exact one that is compatible with your dryer model. You can find the correct replacement part by searching for it with your dryer's model number. When installing the new fuse, make sure the dryer is disconnected from its power source, and be sure to clean the venting to prevent the new fuse from blowing within a few hours of use.
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How to replace a thermal fuse in an electric dryer
Dryers have a built-in safety feature called a thermal fuse, which is designed to prevent overheating. When the dryer gets too hot, the thermal fuse trips or blows, shutting off power to the heating components. Once a thermal fuse is blown, it cannot be reset or reused and must be replaced.
To replace a thermal fuse in an electric dryer, follow these steps:
- Unplug the dryer to disconnect the electrical power.
- Move the dryer forward and use a 1/4-inch nut driver to remove the screws from the back panel.
- Remove the back panel from the dryer and set it aside.
- Vacuum the inside of the dryer cabinet to remove any lint and dust.
- Pull the wires off the thermal fuse.
- Remove the mounting screw using a 1/4-inch nut driver, and pull the fuse off the blower housing.
- 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.
- Put the back panel back on, lining up the mounting screw holes. Insert the mounting screws and tighten them firmly.
- Plug the dryer into the wall outlet to restore electrical power.
To prevent the thermal fuse from blowing again, clean the venting. The number one cause of thermal fuses blowing is the build-up of lint inside the exhaust vent, which makes the dryer overheat. At least once a year, detach the venting from the rear of the appliance and use a vent brush to clean out the lint and any other debris to ensure good airflow.
You can purchase replacement thermal fuses from websites such as Repair Clinic, which stocks thermal fuses for top gas and electric dryer brands including Kenmore, GE, Whirlpool, Maytag, Electrolux, LG, and Samsung. It is important to purchase the exact fuse that is compatible with your model.
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$6.99
Where is the thermal fuse in an electric dryer
If your electric dryer is not heating up, the thermal fuse might be faulty. The thermal fuse is an important safety feature that prevents the dryer from overheating and causing a fire. It is usually located at the back or bottom of the machine, close to the exhaust duct and near the heating element or burner. It is typically white or silver in colour and is a small, rectangular piece with two wires sticking out.
Before attempting to locate and replace the thermal fuse, ensure that the dryer is unplugged and no longer connected to any power source. Once this is done, you can proceed to remove the panel covering the blown thermal fuse. The thermal fuse will be connected to wires and a mounting screw, which you will need to carefully disconnect and unscrew. After successfully removing the blown fuse, you can replace it with a new one, ensuring that it is secured with a screw and the wires are properly attached. Finally, replace the dryer panel and reconnect the dryer to its power source.
It is important to note that a blown thermal fuse may be a sign of another underlying problem. Therefore, it is recommended to identify and address the root cause before replacing the fuse. One common cause of a blown thermal fuse is a blocked exhaust vent, which can lead to the dryer overheating. Regular cleaning and maintenance of the dryer, including the exhaust vent and lint trap, can help prevent issues with the thermal fuse and ensure the safe operation of the appliance.
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How to prevent a thermal fuse from blowing
Electric dryers are equipped with a thermal fuse, a safety device designed to prevent the appliance from overheating and causing damage or a fire. When the dryer gets too hot, the thermal fuse "blows", cutting off the power supply to the heating element.
To prevent a thermal fuse from blowing, you should:
- Regularly clean the lint trap and exhaust vent to avoid clogging, which can cause the dryer to overheat.
- Avoid overloading the dryer with clothes, as this can also cause it to overheat.
- Ensure proper ventilation when using the dryer, as improper ventilation can lead to overheating.
- Periodically check the wiring and connections of the dryer, as loose or damaged connections can cause electrical issues that may lead to blown fuses.
- Address any unusual noises or smells coming from the dryer, as they may indicate a more serious problem that could cause the thermal fuse to blow.
- If the dryer continues to blow fuses, consider seeking the help of a professional technician to identify and address the root cause of the problem.
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What to do if your dryer isn't heating up
If your dryer isn't heating up, there are several things you can do to troubleshoot the issue. Firstly, check if the spin cycle on your washing machine is wringing out enough water from your clothes. If the fabric is excessively wet, it will take longer to dry and can cause humidity buildup in your dryer, slowing the drying process.
Next, ensure that you have selected the correct dryer settings. Electric dryers need 240 volts to heat and run properly, so check your breaker box to ensure the breaker for your dryer hasn't tripped. If it has, try resetting it. Additionally, check your wall socket and plug to ensure they are functioning correctly.
Another common issue is a clogged vent. Clean the lint screen and trap and use a vacuum to clean out the lint trap. Then, remove the vent hose from the back of the dryer and shake it out to dislodge any accumulated items. It is recommended to clean out dryer vent hoses annually to prevent fires.
If your dryer is gas-powered, ensure you have paid your gas bill on time and that the gas valve feeding the dryer is open.
If none of the above solutions work, the problem may lie with the heating element or a faulty thermal fuse. The heating element is usually a big coiled wire, and it may be necessary to replace it. A thermal fuse, on the other hand, is a safety device that protects the appliance from overheating. If the dryer gets too hot, the thermal fuse trips or blows, interrupting the voltage and requiring replacement. You can test the thermal fuse with a multimeter to determine if it has blown.
If you are unable to identify the issue, it is recommended to consult a professional for diagnostic and repair services.
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Frequently asked questions
If your dryer is not heating or even starting, a blown thermal fuse might be the issue. You can check if the fuse is blown by using a multimeter. If the meter display shows zero Ohms of resistance, the fuse is functioning. If the meter display shows no significant change, the fuse has blown and will need to be replaced.
The thermal fuse in your electric dryer can usually be found at the back or bottom of the dryer, on the exhaust duct or near the heating element.
First, purchase a replacement thermal fuse that is compatible with your dryer model. Then, unplug and disconnect your dryer from its power source. Remove the panel covering the blown thermal fuse, and take out the wires and mounting screw from the fuse. Put the new fuse in place, secure it with a screw, and reattach the wires. Finally, replace the dryer panel and reconnect the dryer to its power source.
