Step1: Disconnect electrical power to the equipment and allow it to cool completely.
Step2: Remove the access panel to reach the thermostat and sensing bulb assembly.
Step3: Label and disconnect the wires from the existing thermostat terminals.
Step4: Carefully remove the sensing bulb from its mounting location without damaging the capillary tube.
Step5: Install the new thermostat and route the capillary tube along the original path.
Step6: Secure the bulb in its holder and reconnect the wires to the correct terminals.
Step7: Reinstall the access panel, restore power, and test the thermostat for proper temperature regulation.