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Home >> Hyundai >> 2003 >> Santa Fe Base, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System >> Blower Controls >> Sensor Checking >> Water Temperature Sensor

Water Temperature Sensor

  1. The water temperature sensor, located at the heater core, detects coolant temperature flowing through heater core. It is a negative type thermistor; resistance will increase with lower temperatures, and decrease with higher temperatures.
  2. The sensor will compare temperature settings with the INCAR air temperature or the ambient air temperature for electromotive heating control.
    Fig 1: Water Temperature Sensor Specifications Table
    G01001173Courtesy of HYUNDAI MOTOR CO.
  3. Electromotive heating control

    At AUTO mode, discharge mode FLOOR or B/L, if coolant temperature is low, it will perform motive heating control to prevent cold air discharge toward the passenger legs.

  1. Operation control
    • Discharge mode FLOOR or B/L at AUTO control
    • Coolant temperature is low
  2. System operation
    • Mode door : DEF => MIX => AUTO
    • Blower level : AUTO LO => AUTO HI
    • Intake door : Ambient air
      Fig 2: Checking Water Temperature Sensor Resistance
      G01001174Courtesy of HYUNDAI MOTOR CO.
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