August 1, 2014

How to install a thermal cut-off fuse kit in a gas dryer

By Lyle Weischwill
How to install a thermal cut-off fuse kit in a gas dryer

This dryer repair guide explains how to replace the thermal cut-off fuse in a gas dryer. The thermal cut-off fuse is a safety device that shuts down the burner if the dryer severely overheats. The dryer severely overheats if the high-limit thermostat failed to shut off the dryer when the burner began to overheat. You can't reset a blown thermal cut-off fuse — you must replace it, as well as the failed high-limit thermostat. The thermal cut-off fuse kit contains both components, and the step-by-step instructions in this repair guide show you how to replace them in a gas dryer, using a manufacturer-approved replacement part.

Use this procedure to install a thermal cut-off fuse kit in Kenmore, Whirlpool, Maytag, Amana, Roper, Crosley and Estate gas dryers with a lint screen housing located in the top dryer panel.

If you have an electric dryer, see the repair guide How to Install a Thermal Cut-off Fuse Kit in an Electric Dryer.

Quick links
Tools required
1/4-inch nut driver
Slot screwdriver
Vacuum cleaner or shop vac
Work gloves
Repair difficulty
Time required
15 minutes or less
Repair difficulty
Time required
15 minutes or less
Installing a thermal cut-off fuse kit on a gas dryer

This video shows how to install a thermal cut-off fuse kit in a gas dryer.

Instructions

  1. 01.

    Shut off the power and gas supply

    Unplug the dryer to disconnect electrical power. Shut off the gas supply to the dryer.

  2. 02.

    Remove the back panel

    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.

    Tip: While you have the back of the open, vacuum lint and dust from inside the dryer.
    PHOTO: Remove the back panel screws.

    PHOTO: Remove the back panel screws.

    PHOTO: Remove the back panel from the dryer.

    PHOTO: Remove the back panel from the dryer.

  3. 03.

    Remove the high-limit thermostat

    Label the wires that connect to the high-limit thermostat or take a digital picture so you know how to reconnect them.

    Remove the wires from the high-limit thermostat. Remove the mounting screws that hold the high-limit thermostat in place and pull the high-limit thermostat off of the heater box.

    PHOTO: Remove the wires from the high-limit thermostat.

    PHOTO: Remove the wires from the high-limit thermostat.

    PHOTO: Remove the high-limit thermostat mounting screws.

    PHOTO: Remove the high-limit thermostat mounting screws.

    PHOTO: Remove the high-limit thermostat.

    PHOTO: Remove the high-limit thermostat.

  4. 04.

    Remove the thermal cut-off fuse

    Label the wires that connect to the thermal cut-off fuse or take a digital picture so you know how to reconnect them. Remove the wires from the thermal cut-off fuse.

    Remove the mounting screw. Pull the thermal fuse off of the heater box and set it aside for disposal.

    PHOTO: Remove the wires from the thermal cut-off fuse.

    PHOTO: Remove the wires from the thermal cut-off fuse.

    PHOTO: Remove the thermal cut-off fuse mounting screw.

    PHOTO: Remove the thermal cut-off fuse mounting screw.

    PHOTO: Remove the thermal cut-off fuse.

    PHOTO: Remove the thermal cut-off fuse.

  5. 05.

    Replace the high-limit thermostat and thermal cut-off fuse

    Mount the high-limit thermostat and the thermal cut-off fuse on the heater box using the mounting screws. Referring to the labels on the wires of the digital picture, properly connect the wires on the thermostat and fuse. 

  6. 06.

    Reattach the back panel

    Position the back panel on the back of the dryer. Line up the mounting screw holes. Insert the mounting screws and tighten them firmly.

  7. 07.

    Restore power and the gas supply

    Plug the dryer into the wall outlet. Turn on the gas supply to the dryer.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

Symptoms common to all dryers

Choose a symptom to see related dryer repairs.

Main causes: door switch failure, lack of power, broken belt, blown thermal fuse, bad drive motor, control system failure
Main causes: lack of electrical power, bad power cord, wiring failure, bad control board, blown thermal fuse, bad door switch
Main causes: bad drum support roller, damaged idler pulley, broken blower fan blade, worn drum glide bearing, bad drive motor
Main causes: bad gas valve coils, broken heating element, tripped safety thermostat or fuse, bad operating thermostat, control failure
Main causes: bad timer or electronic control board, door switch failure
Main causes: clogged exhaust vent, bad motor relay, loose dryer door catch, bad door switch, control system failure, faulty drive motor
Main causes: damaged door strike, worn door catch
Main causes: clogged exhaust system, heating system failure, deposits on moisture sensor, control system failure

Repair guides common to all dryers

These step-by-step repair guides will help you safely fix what’s broken on your dryer.

August 1, 2014
By Lyle Weischwill
How to replace a dryer drum support roller

If your dryer thumps or squeals, replace the drum support roller to restore quiet to your home.

Repair difficulty
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August 1, 2014
By Lyle Weischwill
How to replace a dryer idler pulley

The idler pulley exerts pressure keeps the drive belt tight so it can rotate the drum. A worn idler pulley squeals or squeaks when the dryer is running. Follow these instructions to replace it.

Repair difficulty
Time required
 90 minutes or less
August 1, 2014
By Lyle Weischwill
How to replace a dryer thermistor

The thermistor senses the air temperature in the dryer. If your dryer overheats or doesn't heat at all, the thermistor could be the problem.

Repair difficulty
Time required
 30 minutes or less

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