How to Replace the Thermistor in a Dryer

The thermistor in a clothes dryer acts like a circuit breaker to stop the appliance if it is in danger of overheating. The thermistor switch trips open at a preset temperature as a safety feature. When the dryer cools, the switch in the thermistor closes and the appliance will work again. The thermistor may eventually wear out, requiring replacement. Installing a new thermistor takes less than an hour using simple tools.

Screwdriver set

Instructions

- 1
  Unplug the dryer's electrical cord from the outlet. Slide the appliance away from the wall to reach the service panel on the back.
- 2
  Take out the screws holding the service panel in place and set the panel aside. Look to the right of the dryer to locate the blower, which resembles a cylinder with a fan motor. The thermistor is attached to the front of the blower.
- 3
  Pull the two wires gently from the contacts on the thermistor. Remember which contact connects to each wire.
- 4
  Unscrew the two screws holding the thermistor on the blower assembly. The thermistor is permanently attached to an oval-shaped metal plate.
- 5
  Set the new thermistor in position on the blower and secure the part with the two screws.
- 6
  Slide the connector on the end of each wire onto its respective contact on the new thermistor.
- 7
  Reattach the service panel to the back with the screws and screwdriver.
- 8
  Slide the appliance to its original position and plug in the power cord.

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