How to Replace a Thermistor

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Replacing a thermistor on the dryer is important for controlling the heat generated inside the dryer drum. The thermistor is designed to act as a sensor, monitoring the temperature and shutting off the heating element when it is not needed. A faulty thermistor can fail to shut off the heat, allowing the drum to get too hot and possibly causing a fire. The thermistor is attached to the interior dryer panel with screws and can be replaced with some basic tools in about an hour.

Things You'll Need

  • Nut driver
  • Screwdriver
  • Unplug the power cord to the dryer from the electrical outlet before attempting to replace the thermistor. Pull the dryer away from the wall so you can work from behind the appliance, and remove the vent hose from the back panel.

  • Unfasten the hex-head screws that secure the back panel to the dryer with a nut driver and remove the panel, setting it out of the way. Locate the thermistor sensor on the lower part of the interior panel, just above the vent opening.

  • Unplug the electrical wire connectors from the metal prongs on the thermistor, and loosen the screws securing the thermistor to the interior panel with a screwdriver. Remove the thermistor from the dryer.

  • Attach the new thermistor to the interior dryer panel with screws and connect the electrical wires onto the metal prongs. Place the rear panel onto the back of the dryer and fasten the panel with the hex-head screws.

  • Connect the vent hose to the back of the dryer and slide the appliance against the wall. Plug the power cord of the dryer into the electrical outlet.

Tips & Warnings

  • To prevent electric shock, always unplug the power cord to the dryer from the electrical outlet before attempting to replace the thermistor.

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