The thermal cut-off fuse (also known as a high-limit thermostat or safety fuse) is a critical safety component in gas dryers, including Whirlpool models. It is designed to prevent overheating by interrupting power to the heating system if the dryer exceeds a safe temperature. The part number WP8573713 (or 8573713) is specific to certain Whirlpool dryer models.
Part Number: WP8573713 / 8573713
Function: Acts as a safety device to shut off the heating element if the dryer overheats.
Temperature Rating: Typically opens (breaks the circuit) at a specific temperature, often around 194°F (90°C) for the thermal fuse and higher for the high-limit thermostat.
Location: Usually located near the heating element or exhaust vent in the dryer.
Compatibility: Check your dryer's manual or model number to confirm compatibility with this part.
If your dryer is not heating or stops mid-cycle, the thermal cut-off fuse may be faulty. Here’s how to diagnose and troubleshoot:
Symptoms of a Faulty Thermal Fuse:
Dryer drum turns, but no heat is produced.
Dryer stops mid-cycle and won’t restart.
Dryer runs but doesn’t dry clothes effectively.
Testing the Thermal Fuse:
Unplug the dryer from the power source.
Locate the thermal fuse (refer to your dryer’s manual for its exact location).
Use a multimeter to test for continuity:
Set the multimeter to the ohms (Ω) setting.
Place the probes on the two terminals of the fuse.
If the multimeter shows no continuity (infinite resistance), the fuse is blown and needs replacement.
Common Causes of a Blown Fuse:
Blocked dryer vent or exhaust system.
Overheating due to restricted airflow.
Malfunctioning thermostat or heating element.
Replacing the thermal cut-off fuse is a straightforward process. Follow these steps:
Safety First:
Unplug the dryer from the electrical outlet.
Turn off the gas supply (if applicable).
Access the Thermal Fuse:
Remove the dryer’s back panel or front panel, depending on the model.
Locate the thermal fuse near the heating element or exhaust vent.
Remove the Old Fuse:
Disconnect the wires attached to the fuse (take a photo or note the wiring for reference).
Remove the mounting screws or clips holding the fuse in place.
Install the New Fuse:
Position the new thermal fuse (WP8573713) in the same location.
Secure it with screws or clips.
Reconnect the wires to the new fuse.
Reassemble the Dryer:
Replace the back or front panel.
Plug the dryer back into the power source.
Turn on the gas supply (if applicable).
Test the Dryer:
Run the dryer on a heat cycle to ensure it’s functioning properly.
To avoid future issues with the thermal cut-off fuse:
Regularly clean the lint filter and exhaust vent.
Ensure proper airflow by inspecting the vent hose for blockages.
Avoid overloading the dryer, as this can cause overheating.