The Whirlpool WP3387134 is a Genuine Whirlpool OEM dryer cycling thermostat used to regulate dryer operating temperature by opening and closing the heat circuit as temperatures change.
This thermostat is commonly identified as an L155-25 cycling thermostat and uses an internal bias heater. Service information lists an approximate opening temperature of 155°F and reset/closing temperature near 130°F.
No-heat, overheating, or temperature-control problems can also involve airflow restrictions, the heating system, thermal fuses, controls, or wiring, so diagnosis should confirm the thermostat is the failed component.
Compatibility Note: Dryer thermostats may have similar appearance but different temperature ratings, terminal arrangements, or applications. Verify the complete dryer model before ordering.
Important Safety Note: Disconnect dryer electrical power before service. Shut off the gas supply before servicing a gas dryer.
Installation Note: Inspect exhaust airflow and wiring/terminals for overheating or damage before installing the replacement thermostat.