The 5304509474 high limit thermostat is a safety component for Frigidaire, Electrolux, Kenmore, and Crosley microwaves, designed to prevent overheating-related damage.
How It Works
This is a normally closed switch：Under normal operating temperatures (below 120℃/248°F), it maintains a closed circuit to allow the microwave's heating components to work. When internal temperatures rise to 120℃—typically caused by blocked vents, faulty fans, or component malfunctions—the switch disconnects the circuit, cutting power to the heating elements. Once the microwave cools down below 120℃, the switch closes again to restore normal operation.
Key Check for Functionality
For DIY testing: At room temperature, use a multimeter to check continuity—this switch should show continuity (closed circuit) when cool. If there's no continuity at room temperature, the switch is defective. When heated to 120℃, continuity should stop (open circuit), confirming it works as intended.
Compatibility Details
This thermostat fits select models from:
Frigidaire (Gallery, Professional, Classic series)
Electrolux (Icon, EW24 series)
Kenmore (790.xxxxxxx, 721.xxxxxxx model ranges)
Crosley microwave models
Always verify your microwave's exact model number against the manufacturer's specifications to ensure a proper fit.
Installation Tips
1. Unplug the microwave from the power source before starting—never work on a live appliance.
2. Remove the microwave's outer cover using a Phillips screwdriver (refer to the manual for cover removal steps).
3. Locate the old thermostat (usually near the magnetron or vent assembly, labeled with its part number).
4. Disconnect the 2 wires from the old thermostat, remove it, and attach the new 5304509474 unit to the same mounting position.
5. Reconnect the wires, replace the outer cover, and plug the microwave back in. Test by running a short heating cycle to confirm normal operation.
Package includes 1 x 5304509474 High Limit Thermostat.