Condensation or moisture on exterior door surfaces or between French doors.

Safety first: No internal electrical work is required for basic checks.

• 1. Check energy saver setting: On models with a condensation control or energy saver switch, turn condensation control ON to activate door heaters.
• 2. Dry surfaces: Wipe moisture and monitor if it returns quickly.
• 3. Inspect gaskets: Ensure door gaskets seal properly to reduce moist air infiltration.
• 4. If heaters fail: If condensation persists with condensation control ON, the mullion heater strip may be faulty and require replacement.