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Thermal fuse - Kitchen Appliances - Others

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Whats wrong with thwrmal fuse?

Posted on Nov 25, 2014


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The difference between thermal fuse and thermostat


Thermal fuse is a heat-sensitive safety feature that shuts down system when overheating is detected.
In electrical wiring, the thermal fuse reacts to high temperature caused by too many amps on the electric circuit. When temperature exceeds the fuse amp rating, then the fuse trips and cuts power to electric circuit.
Example of thermal fuse is a household circuit breaker.
Gas water heaters have a different type of thermal fuse located in the combustion chamber or on the combustion chamber door, and also inside a copper probe inside water tank. Water heater thermal fuses will trip when water temperature exceeds fuse rating, or when heat inside the combustion chamber exceeds temperature rating of fuse. This action will cut off gas supply to water heater.
So a thermal fuse is a safety feature.

Thermostat is not a safety feature.
Thermostat is a measuring tool.
Thermostats measure temperature.
Example of thermostat is outdoor thermometer, or cooking thermometer, or Heat-AC control located on wall inside house.
Thermostats can give a simple temperature reading, or they can cause a separate control to turn on-off depending on application.
For example thermostat on Heat-AC will read room temperature, and when temperature exceeds setting, this triggers a switch that turns Heat-AC on-off.

Many appliances have both thermal safety fuse and thermostat.
Take for example a gas water heater. A copper tube extends into the water tank. Inside the copper tube are 2 things: A thermostat probe to measure water temperature, and a thermal fuse called an ECO for energy cut off. The ECO is a thermal fuse, and is a safety feature.
http://waterheatertimer.org/images/Gas-valve-ECO2-358.jpg
The thermostat reads temperature of water, and turns water heater on-off to keep water hot. A person can adjust water temperature by adjusting the thermostat dial on front of water heater.
However if the thermostat fails, or some other problem occurs, and water inside the tank gets hotter than 180 degrees, then the ECO or thermal fuse will trip. When the thermal fuse trips, this turns off gas to the water heater so water cannot get any hotter. The safety device prevents water heater explosion. The water heater must be repaired since this particular thermal fuse cannot be re-used afterwards, and must be replaced.

Oct 11, 2012 | Dryers

1 Answer

I have a Kenmore Dryer, Model 96292110. It runs, but it does not heat the air. I have checked the circuit breakers. They are fine.


Hello,

If your Maytag dryer has mysteriously stopped producing heat, a blown thermal fuse may be the cause of your problem. In Whirlpool dryers,thermal fuses are safety switches that are designed to disrupt the flow of electricity to your dryer's heating mechanisms once the dryer reaches a predetermined maximum temperature, usually somewhere around 180 degrees F.

Thankfully, troubleshooting the thermal fuse in a Maytag dryer is easier than it sounds.

Instructions And Things You'll Needed.
  • Screwdriver,Towel,Electrical tape,Replacement thermal fuse, if necessary.
1 Clean out thelint screen in your Maytag clothes dryer. Lint buildup can cause your dryerto overheat, triggering the thermal fuse to disrupt power to your dryer'sheating mechanisms. Take the lint screen out of your Whirlpool dryer and washit in warm water. Dry the screen thoroughly before replacing it.

2 Look behindthe dryer to check its flexible exhaust hose for kinks or obstructions.Disconnect the exhaust hose from the back of your dryer and clean out any lintthat has built up.

3 Go outside andcheck your Maytag dryer's exhaust vent for obstructions. Lint buildup, birdnests or other obstructions in the outside exhaust vent can trigger yourdryer's thermal fuse.

4 Disconnectyour dryer from its power source before attempting to access its thermal fuse.

5 Access the thermal fuse in your Maytag dryer byremoving the back panel. Remove the screws that hold the back panel in placeand it should easily come free.

6 Look betweenthe dryer's blower housing and exhaust to locate its thermal fuse. The thermalfuse in a Whirlpool dryer looks like a white plastic strip that has two wiresconnected to it.

7 Bypass the thermal fuse in your Maytag dryer whileyou perform a quick diagnostic test. Use electrical tape to tape together thetwo wires connected to the thermal fuse. Reassemble your dryer and plug it backin. Set the dryer to a timed heated drying cycle and press "Start."If the dryer produces heat with its thermal fuse bypassed, it means the thermalfuse needs to be replaced.

8 Replace a blown thermal fuse in your Maytag dryer.Disconnect the power and remove the back panel. Remove the electrical tape thatyou used to perform the diagnostic test and disconnect the wires from thethermal fuse. Remove the screws that secure the thermal fuse to the dryer anddiscard the blown fuse. Attach the replacement thermal fuse by replacing andtightening the screws. Attach the wires to the new thermal fuse.

Thanks for using fixya.

Jul 31, 2011 | Kenmore Dryers

1 Answer

Cabrio electic dryer has power but will not run


There is a thermal fuse wired in series with the motor and if it is blown, power to the motor is cut and cannot. No dryer function works when the motor cannot run. The thermal fuse usually blows due to a failed exhaust thermistor. Check for clogged lint filter and/or restricted vent system then replace both the thermal fuse and the thermistor if the thermal fuse is found blown open. This is a DIY repair which only requires very minimal effort with a screwdriver.

Disconnect power then remove the back panel and locate the thermal fuse and the thermal fuse on the blower housing.
jahn27_275.jpg

Click on the link below for some troubleshooting information before replacing the thermal fuse and the thermistor.

Kenmore and Whirlpool Dryers Not Starting

Jun 17, 2011 | Whirlpool WED7300XW Dryer

2 Answers

Amana dryer model YNED7200TW will not start. there is power, but start button does nothing. Resetting breaker did not work. Any ideas?


Thermal Fuse

Item #2986 (OEM Part)
$10.70

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.

Manufacturer Number 3392519
More

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  • Kenmore Washer/Dryer Combo Thermal Fuse
  • KitchenAid Dryer Thermal Fuse
  • KitchenAid Washer/Dryer Combo Thermal Fuse
  • Magic Chef Dryer Thermal Fuse
  • Maytag Dryer Thermal Fuse
  • Roper Dryer Thermal Fuse
  • Roper Washer/Dryer Combo Thermal Fuse
  • Whirlpool Dryer Thermal Fuse
  • Whirlpool Washer/Dryer Combo Thermal Fuse

In Stock
Quantity: http://www.repairclinic.com/PartDetail/Thermal-Fuse/3392519/2986#repairHelpVideoTabs

Jun 08, 2011 | Amana Dryers

1 Answer

Whirlpool AWZ7303 condensing tumble dryer . Drum not turning although it is heating


If your Whirlpool dryer has mysteriously stopped producing heat, a blown thermal fuse may be the cause of your problem. In Whirlpool dryers, thermal fuses are safety switches that are designed to disrupt the flow of electricity to your dryer's heating mechanisms once the dryer reaches a predetermined maximum temperature, usually somewhere around 180 degrees F. Thankfully, troubleshooting the thermal fuse in a Whirlpool dryer is easier than it sounds. Instructions:

  • Clean out the lint screen in your Whirlpool clothes dryer. Lint buildup can cause your dryer to overheat, triggering the thermal fuse to disrupt power to your dryer's heating mechanisms. Take the lint screen out of your Whirlpool dryer and wash it in warm water. Dry the screen thoroughly before replacing it.
  • Look behind the dryer to check its flexible exhaust hose for kinks or obstructions. Disconnect the exhaust hose from the back of your dryer and clean out any lint that has built up.
  • Go outside and check your Whirlpool dryer's exhaust vent for obstructions. Lint buildup, bird nests or other obstructions in the outside exhaust vent can trigger your dryer's thermal fuse.
  • Disconnect your dryer from its power source before attempting to access its thermal fuse.
  • Access the thermal fuse in your Whirlpool dryer by removing the back panel. Remove the screws that hold the back panel in place and it should easily come free.
  • Look between the dryer's blower housing and exhaust to locate its thermal fuse. The thermal fuse in a Whirlpool dryer looks like a white plastic strip that has two wires connected to it.
  • Bypass the thermal fuse in your Whirlpool dryer while you perform a quick diagnostic test. Use electrical tape to tape together the two wires connected to the thermal fuse. Reassemble your dryer and plug it back in. Set the dryer to a timed heated drying cycle and press "Start." If the dryer produces heat with its thermal fuse bypassed, it means the thermal fuse needs to be replaced.
  • Replace a blown thermal fuse in your Whirlpool dryer. Disconnect the power and remove the back panel. Remove the electrical tape that you used to perform the diagnostic test and disconnect the wires from the thermal fuse. Remove the screws that secure the thermal fuse to the dryer and discard the blown fuse. Attach the replacement thermal fuse by replacing and tightening the screws. Attach the wires to the new thermal fuse.
  • Apr 20, 2011 | Whirlpool AWZ7303 Electric Dryer

    1 Answer

    How do i replace the thermal fuse


    Hello there
    Unplug your dryer from its electrical outlet. make sure that all electricity has been disconnected from your dryer before moving on

    turn off the gas valve that supplies gas to your dryer. Remove the gas flex line at the shut-off valve using an adjustable wrench.


    Remove your dryer's back panel. take out the screws on the back of the dryer and the panel will come free. set the panel and screws aside until you are ready to replace them.


    locate the thermal fuse between the dryer's blower housing and exhaust. the thermal fuse looks like a white plastic strip with two connected wires.


    unplug the wires connected to the thermal fuse.


    remove the screw that secures the thermal fuse to your dryer. set the screw aside and discard the broken thermal fuse.


    replace the thermal fuse screw to attach the new replacement thermal fuse to your dryer.


    reconnect the wires to the thermal fuse.

    Mar 08, 2011 | Kenmore 77082 Gas Dryer

    1 Answer

    Our Whirlpool dryer model #LER7646AQ0 will not start. Door switch checks for power with a power tester. Put new start switch in and still doesn't work. Do I need to use Ohm tester or will power tester...


    This problem is commonly caused by a blown thermal fuse located on the blower housing. The thermal fuse is wired in series with the motor and the motor activates a centrifugal switch for the heating element when it runs. These setup makes the dryer fail to start and the heating element not to turn on if the thermal fuse is blown. The dryer seems to no work at all. Verify the condition of the thermal fuse by bypassing it and starting the dryer.

    Disconnect power then access and bypass the thermal fuse on the blower housing. The blower housing is located on the rear left bottom of the dryer cabinet. Remove the rear panel to access the blower housing and so the thermal fuse.

    jahn27_41.jpg

    Bypass the thermal fuse by disconnecting the wires and connecting them together. Insulate them properly and plug the dryer back in. The thermal fuse is indeed blown and needs to be replaced along with the cycling thermostat if the dryer starts. Do not use the dryer with the thermal fuse bypassed due to fire hazards.


    The thermal fuse and cycling thermostat are part numbers 3392519 and 3387134, respectively.

    Jan 11, 2011 | Dryers

    1 Answer

    I have Model # LER5636EQ3 dryer it all of a sudden quit working in the middle of a drying cycle. I Checked fuses in house all OK. Checked to see if other cycles worked will not start or make a sound at...


    This problem is commonly caused by a blown thermal fuse located on the blower housing. The thermal fuse is wired in series with the motor and the motor activates a centrifugal switch for the heating element when it runs. These setup makes the dryer fail to start and the heating element not to turn on if the thermal fuse is blown. The dryer seems to no work at all. Verify the condition of the thermal fuse by bypassing it and starting the dryer.

    Disconnect power then access and bypass the thermal fuse on the blower housing. The blower housing is located on the rear left bottom of the dryer cabinet. Remove the rear panel to access the blower housing and so the thermal fuse.

    jahn27_41.jpg

    Bypass the thermal fuse by disconnecting the wires and connecting them together. Insulate them properly and plug the dryer back in. The thermal fuse is indeed blown and needs to be replaced along with the cycling thermostat if the dryer starts. Do not use the dryer with the thermal fuse bypassed due to fire hazards.


    The thermal fuse and cycling thermostat are part numbers 3392519 and 3387134, respectively.

    Dec 30, 2010 | Whirlpool LER5636P Electric Dryer

    1 Answer

    Removing a part form a Whirlpool Electric Dryer


    The thermal fuse is located on the outside of the blower housing. To get access to the thermal fuse you will need to remove the back panel of your Whirlpool dryer.

    How do you check it:
    Before you do any repairs on your dryer, you will need to disconnect the dryer from the wall outlet.


    After removing the back panel, remove one wire from the Whirlpool dryer thermal fuse and take a reading between the two terminal on the thermal fuse.
    The reading should be 0 ohms, if the reading is infinity, the thermal fuse is bad and it must be replace. When you find a bad thermal fuse, you will need to replace the operating thermostat too.

    The operating thermostat opens at 155 degrees and the thermal fuse blows at 196.

    These means that operating thermostat did not open at 155 and that is why the thermal fuse failed.

    Jul 12, 2010 | Whirlpool Dryers

    2 Answers

    Thermal fuse change on Kemore 970.c85042-00


    First you need to know your dryer over heated and the thermal fuse tripped for a reason.

    You will need to replace the thermal fuse, thermal fuses are there to protect the dryer. When you have the dryer apart clean all the venting and vacuum out the dryer. Look online for a parts supplier in your area, you will need your model and serial number to order the thermal fuse they are about ten dollars.

    how long is the venting, does it exceed 20 feet, how many elbows. Make sure the outside hood is clean

    May 05, 2008 | Kenmore 63942 Dryer

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