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Dryer Thermostat Fuse Failing Continuously

The thermostat fuse is a safety component that prevents residential dryers from overheating to dangerous temperatures. When the dryer starts to get too hot and the thermostat fuse disrupts the electricity to the heating element, you must replace the fuse to restore heat. If you find yourself replacing the thermostat fuse with surprising frequency, there's an underlying issue that needs to be addressed. Troubleshoot the dryer to get to the root of the problem.
  1. Safety First

    • As with any electrical appliance, there is a risk of electrical shock if the dryer is troubleshooted or repaired while connected to a power source. Avoid possible serious injury or death by completely disconnecting the supply of electricity before you begin the troubleshooting process. Flip the corresponding circuit breaker switch to the "Off" position and unplug the appliance. When your repairs are finished, reverse the disassembly process and restore the power to the dryer.

    Poor Air Circulation

    • The heat produced by a dryer during a regular drying cycle can build up in small, enclosed laundry rooms and cause the appliance to overheat. Keeping the air around your dryer circulating while it is operating can help reduce the risk of overheating. Leave the door to the laundry room cracked whenever the dryer is in use to allow hot air to escape. If your laundry room has a window, open it at least 2 to 3 inches to let fresh air into the room.

    Trapped Lint

    • A build up of lint in the lint filer can also cause the dryer to overheat and activate the thermostat fuse. If you only clean the lint filter occasionally, it's possible for an excessive amount of lint to build up in the filer and filer housing. Pull out the lint filter and clean it; if the filter is clean, check for trapped lint in the filter housing. Cleaning the lint filter after each use may help to prevent future instances of overheating.

    Obstructed Exhaust Hose or Vent

    • The hot exhaust must be able to escape through the exhaust hose and outdoor vent. If the hose is kinked or clogged, or the outdoor vent is obstructed, the hot air can build can build and cause the thermostat fuse to fail. Pull the dryer away from the wall and detach the exhaust hose. Straighten any kinks in the hose and wash the inside to remove any clumps of lint. Leaves, lint and grime can accumulate on the outdoor exhaust vent. Check the outdoor dryer vent periodically to ensure that it remains clear.