Professional Installation Protocol Safety First: Allow printer to cool 30 mins before replacement! Unlock Open rear access panel Disconnect power cable Release fuser retention lever Slide out old unit vertically Remove protective pads from new fuser Align Insert until audible click Secure lever Close panel Power on Run calibration page Maintenance Diagnostics Proactive Replacement Cycle Recommended when error codes display: Symptom Alert Faded prints / paper curl / unusual odor