Kia Optima: Inspection - Power Mosfet. Repair procedures - Blower - Heating,Ventilation, Air Conditioning - Kia Optima TF 2011-2021 Service ManualKia Optima: Inspection

1. Ignition "ON"
2. Manually operate the control switch and measure the voltage of blower motor.
3. Select the control switch to raise voltage until high speed.

Specification

Specification
Fan
Motor Voltage
Manual
First speed
3.8 ±0.5V
Second speed
5.0 ±0.5V
Third speed
6.2 ±0.5V
Fourth speed
7.4 ±0.5V
Fifth speed
8.6 ±0.5V
Sixth speed
9.8 ±0.5V
Seventh speed
11.0 ±0.5V
eighth speed
Battery

*AUTO COOLING: Auto speed (4.5V~B+)

*AUTO HEATING: Auto speed (4.5V~11.0V)
4. If the measured voltage is not specification, substitute with a known-good power mosfet and check for proper operation.
5. If the problem is corrected, replace the power mosfet.

Power Mosfet. Repair procedures
...

Replacement
1. 1. Disconnect the negative (-) battery terminal. 2. Remove the main crash pad lower cover (A). 3. Disconnect the power mosfet connector ...

See also:

Inspection
1. Check for the following items visually. A. Cracks or leakage of the canister B. Loose connection, distortion, or damage of ...

Air Bag Warning
This warning light will remain on for approximately 6 seconds each time you turn the ignition switch ON. If the system does not operate as described or if the light comes on while the vehicle is ...

Parking Assist Sensor. Components and Components Location
Component ...

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