Condensation or moisture on the exterior cabinet or around door gaskets.

Safety: Unplug the refrigerator before accessing any heater wiring.

Steps:

• Check settings: Some Sharp models allow turning energy saver (mullion heater off) on or off. Disable energy saver in very humid environments.
• Inspect gaskets: Ensure door gaskets seal well to minimize moist air infiltration.
• Wipe moisture: Regularly wipe condensation to prevent mold.
• Heater check (advanced): If condensation persists along the door frame, a door/mullion heater may have failed and should be tested and replaced by a technician.