GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Eldorado 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Functional Check

Action

Normal Result

Start the engine.
  • The engine warms in order to perform the test.

Press the OFF button.
  • With the blower OFF, the display shows the following information:
    • The set temperature
    • OFF
    • The outside temperature

Press the AUTO button.
    • The system turns ON.
    • The display shows the AUTO fan and AUTO mode.

Set the temperature at 15°C (60°F).
    • The blower is at high speed.
    • Cold air flows from the A/C outlets.

Press the ECON button.
    • The RECIRC LED turns OFF.
    • ECON is displayed.

Press the RECIRC button.
    • The RECIRC LED is ON.
    • The blower noise slightly increases.

Press the AUTO button.
  • The blower is at high speed.

Set the temperature to 32°C (90°F).
    • Hot air flows from the heater outlets.
    • The RECIRC LED is OFF.

Press the DEFOG button (if equipped).
    • Air flows from the heater outlets.
    • The RECIRC LED is OFF.

Press the RECIRC button.
    • The RECIRC LED is ON.
    • The blower noise increases slightly.

Press the DEFROST button.
    • Air flows from the windshield outlets.
    • The RECIRC LED is OFF.

Press the FAN down button 2 times.
  • The blower is at low speed.

Press the MODE up button.

Air flows from the heater outlets and the windshield outlets.

Press the MODE down button.

Air flows from the A/C outlets.

Press the MODE down button.

Air flows from the A/C outlets and from the heater outlets.

Press the MODE down button.

Air flows from the heater outlets.

Set the temperature to 32 °C (90 °F).

Hot air flows from the windshield outlets.

  1. Set the temperature to 24 °C (75 °F).
  2. Press the AUTO button.

AUTO is displayed.

Press the PASS TEMP up button 4 times.
    • The air from the right side A/C outlets should be warmer than the driver side outlets.
    • The display shows 3.5 red bars.