Auto defogging system

2025 Hyundai Tucson Auto defogging system sensor location image. The main view shows the vehicle's windshield with the sensor housing area at the top center. A detailed inset shows the interior rearview mirror and the sensor cover behind it. Describes the position of the sensor that automatically detects moisture to prevent fogging.

2C_RainSensor

The Auto defogging reduces the possibility of fogging up the inside of the windshield by automatically sensing the moisture on inside the windshield.

The auto defogging system operates when the heater or air conditioning is on.

The Auto defogging system may not operate normally, when the outside temperature is below -10 °C (14 °F).

When the Auto Defogging System operates, the (Ż) indicator illuminates.

If high amount of humidity is detected in the vehicle, the Auto defogging system is enabled.

The following steps are performed automatically:

Step 1. Air conditioning turns on and Outside (fresh) mode is selected.

Step 2. Defrost level is selected.

Step 3. Fan speed is set to the highest level.

If the air conditioning is off or recirculated air is manually selected while Auto defogging system is ON, the Auto defogging system (Ż) indicator blinks to signal that manual operation has been canceled.

Turning the Auto defogging system on or off

Climate control system

Press the front windshield defroster button for 3 seconds when the Engine Start/Stop button is in the ON position. When the Auto defogging system is turned off, the Auto defogging system (Ż) indicator blinks 3 times on the climate control information screen.

When the Auto Defogging system is turned on, the Auto defogging system (Ż) indicator blinks 6 times without a signal.

Infotainment system

Auto Defogging System can be turned on and off by selecting Settings > Vehicle > Climate > Defog/Defrost options > Auto defog from the infotainment system.

Do not remove the sensor cover located on the top of the windshield glass. Damage may not be covered by your vehicle warranty.

  • Do not select recirculated air while the Auto defogging system is operating.

  • When Auto defogging system is operating, fan speed adjustment, temperature adjustment, and air intake control selection are all disabled.