2003 Expeditiion Eddie Bauer Climate control question

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Sep 13, 2018 | 02:36 PM

rog2867

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Joined: Sep 2018

Posts: 31

2003 Expeditiion Eddie Bauer Climate control question

Hi, hope someone can help me. I have a 2003 Expedition Eddie Bauer, this week it started switching from AC cold air to Hot air back and forth through the front facing AC vents. I seem to remember that if I had the unit set to auto and I pressed the fan up or down button the auto light would go off as I have now taken manual control of the system. This is not not functioning, the light for auto stays on no matter what. I am wondering if you think this is the digitial climate control module that needs to be replaced. If so should I get a used one from ebay for 50-75$ or go new? What does new cost? Is it hard to swap out? Do I need to take the dash apart to do that?

Thanks

roger

Sep 13, 2018 | 09:01 PM

Hayapower

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Joined: Jul 2006

Posts: 7,555

Welcome to the site..

Have you put it in self test mode?

The DATC/EATC module self-test will detect concerns in the system control functions and will display hard diagnostic trouble codes in addition to intermittent diagnostic trouble codes for concerns that occur during system operation.
The vehicle interior temperature should be between 4-32°C (40-90°F) when performing the self-test. If the temperatures are not within the specified ranges, false in-car temperature sensor DTCs will be displayed.
The self-test can be initiated after cycling the ignition switch from OFF to ON. (Normal operation of the climate control system stops when the self-test is activated.)
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within two seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. (Record all DTCs displayed.)
If any DTCs appear during the self-test, follow the diagnostics procedure given under ACTION for each DTC given.
To exit self-test and retain all intermittent DTCs, push the blue (cooler temperature) button. The control will exit self-test, retain all intermittent DTCs and then turn OFF (display blank).
To exit self-test and clear all DTCs, press the DEFROST button. The vacuum fluorescent display window will show 888 and all function symbols for one second. Then, the DATC/EATC control assembly will turn OFF (display blank) and all DTCs will be cleared.
Always exit the self-test before powering the system down (system turned OFF).
Intermittent DTCs will be deleted after 80 ignition switch ON cycles after the intermittent condition occurs.