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Home >> Kia >> 2007 >> Sedona Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Blower Controls >> Power MOSFET >> Inspection

Power MOSFET: Inspection

  1. Ignition "ON"
  2. Manually operate the control switch and measure the voltage of blower motor between pin 1 and 2.
  3. Select the control switch to raise voltage until high speed.
    Fig 1: Measuring Voltage Of Blower Motor Between Pin 1 And 2
    G04806785Courtesy of KIA MOTORS AMERICA, INC.

    SPECIFICATION 

    FAN MOTOR VOLTAGE SPECIFICATION

    Fan Motor Voltage
    Manual
    First speed 3.8 ± 0.5V
    Second speed 4.9 ± 0.5V
    Third speed 6.1 ± 0.5V
    Fourth speed 7.2 ± 0.5V
    Fifth speed 8.3 ± 0.5V
    Sixth speed 9.5 ± 0.5V
    Seventh speed 10.6 ± 0.5V
    eighth speed Battery (+)

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

    *AUTO HEATING: Auto speed (4.5V~10.5V)

  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.
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