Step1: Shut off power supply and let the unit cool completely before handling components.
Step2: Remove the control knob from the thermostat D-stem.
Step3: Align the adaptor with the thermostat shaft ensuring correct orientation.
Step4: Slide the adaptor onto the stem until it fits snugly and evenly.
Step5: Reinstall the knob onto the adaptor and confirm secure connect.
Step6: Rotate through settings to ensure proper control movement and calibration.
Step7: Restore power and test thermostat response for accuracy.