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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 225 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> Air Temperature Malfunction >> Component Testing

Component Testing

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  1. A thermometer can be used to test the sensor off the vehicle in warn and or cold water. Sensor Resistance Table  for this test.
  2. Test the evaporator air temperature sensor by varying the sensor temperature while monitoring the sensor resistance.
  3. Compare the readings with the Temperature VS Resistance table and verify that the resistance is within 5 percent of the specification.
    • If not within the specified range, replace the sensor.
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