Step1: Disconnect power and water supply at breaker and shutoff valves.
Step2: Remove dishwasher front access panel carefully using proper tool.
Step3: Locate old thermostat and bulb assembly inside tub area.
Step4: Carefully detach wiring harness and capillary tube without bending.
Step5: Install new thermostat, mount securely, and position bulb correctly.
Step6: Reconnect wiring terminals and ensure all fittings are tight.
Step7: Restore power and water, then test dishwasher cycle for better operation.