Step1: Disconnect power to the unit before servicing.
Step2: Remove the control panel and thermostat knob to access the existing thermostat.
Step3: Label and disconnect all wire terminals from the old thermostat.
Step4: Carefully remove the sensing bulb and capillary tube without bending or damaging them.
Step5: Install the new thermostat, routing the capillary tube smoothly and securing the bulb in place.
Step6: Reconnect wiring, tighten mounting hardware, and reinstall the control panel.
Step7: Restore power and test temperature adjustment for proper operation.