Kia Optima: Windshield defrosting and defogging / Defogging logic

Kia Optima DL3 2019-2020 Owner's Manual / Features of your vehicle / Windshield defrosting and defogging / Defogging logic

To reduce the possibility of fogging up the inside of the windshield, the air intake or air conditioning is controlled automatically according to certain conditions such as or position. To cancel automatic defogging logic or return to the automatic defogging logic, do the following.

Manual climate control system

1. Turn the ignition switch to the ON position.

2. Press the defroster button ().

3. Within 3 seconds after pressing the defroster button, press the air intake control button at least 5 times within 3 seconds.

If the battery has been discharged or disconnected, it resets to the defog logic status.

Automatic climate control system

1. Turn the ignition switch to the ON position.

2. Press the defroster button ().

3. While pressing the air conditioning button (A/C), press the air intake control button at least 5 times within 3 seconds.

The recirculation indicator blinks 3 times with 0.5 second of interval. It indicates that the defogging logic is canceled or returned to the programmed status.

If the battery has been discharged or disconnected, it resets to the defog logic status.

Auto defogging system

Auto defogging reduces the probability of fogging up the inside of the windshield by automatically sensing the moisture of inside the windshield.

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

This indicator illuminates when the auto defogging system senses the moisture on the inside of the windshield and operates.

The auto defogging system addresses excess moisture on the inside of the windshield in stages. For example if auto defogging does not defog inside the windshield at step 1 Outside air position, it tries to defog again at step 2 Operating the air conditioning.

Step 1 : Outside air position
Step 2 : Operating the air conditioning
Step 3 : Blowing air flow toward the windshield
Step 4 : Increasing air flow toward the windshield

To cancel or reset the Auto Defogging System

Press the front windshield defroster button for 3 seconds when the ignition switch is in the ON position. When the Auto Defogging System is canceled, ADS OFF symbol will blink 3 times and the ADS OFF will be displayed on the climate control information screen.

When the Auto Defogging System is reset, ADS OFF symbol will blink 6 times without a signal.

CAUTION

Do not remove the sensor cover located on the upper end of the passenger side windshield glass. Damage to the system parts could occur and may not be covered by your vehicle warranty.

Automatic ventilation

When the ignition is ON or when the engine is running and the outside temperature is below 15°C (59°F), the automatic ventilation feature will activate if the recirculated air intake position is selected for more than 5 minutes while A/C is off and floor mode is selected. In this condition the air intake position will automatically switch to the outside (fresh) air intake position.

To cancel or reset the Automatic Ventilation

When the air conditioning system is on, select Face Level mode and keep pressing the air intake control button more than 3 seconds.

When the automatic ventilation is canceled, the indicator blinks 3 times. When the automatic ventilation is activated, the indicator blinks 6 times.

Automatic climate control system
To defog inside windshield 1. Set the fan speed to the desired position. 2. Select desired temperature. 3. Press the defroster button (). 4. The outside (fresh) air position will be selected aut ...

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