Step1: Disconnect power and ensure fryer is cool to prevent burns or shock.
Step2: Remove control panel/access cover to reach thermostat assembly.
Step3: Detach faulty hi-limit thermostat and note wiring positions.
Step4: Install new thermostat securely and reconnect wires as labeled.
Step5: Reassemble cover, restore power, and test manual reset function.
Step6: Verify thermostat calibration and inspect for leaks or loose connections before operation.
Step7: Allow professional inspection if reset fails or overheating occurs.