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Home >> Jeep >> 2005 >> Wrangler X, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (HVAC Systems) >> Diagnosis And Testing >> Diagnosis And Testing - A/C Cool Down Test >> Automatic Temperature Control

Automatic Temperature Control

WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

The ambient air temperature in the room where the vehicle will be tested must be a minimum of 21° C (70°F) for this test. The test is activated by depressing the A/C and PWR buttons simultaneously and holding them depressed for no less than four seconds. The snowflake icon and the DELAY text in the ATC display will blink on and off alternately until the test is complete. If the snowflake icon and the DELAY text stop blinking before two minutes, then the cool down test has been completed successfully. If the two minutes expire without the evaporator temperature reaching -6° C (20° F) less than the evaporator initial temperature, then the cool down test has been failed and further A/C system diagnosis is required. If the test is failed, the snowflake icon and the DELAY text will continue to blink across ignition cycles until the vehicle has been driven for greater than 1.6 km (8 miles).