I have a 2000 w/ the 5.4L. It is Spring time here in Texas, and the weather's already gettin pretty warm. I know in CA, when it's hot, you can just roll down the window and let the nice cool breeze take over. In TX, though, you have to have A/C, and keep the windows up. Well, lately I've just been putting it on vent (at 75 - 80 degrees outside) and the air has been getting pretty cold. I know you could do this in CA, but that just doesn't happen here in TX. I couldn't hear if the A/C was switching on or not while I'm driving, but normally at 75 - 80 degrees I would just get semi-cool air. Have any of you ever had your A/C working in ALL positions of the dial?

 

Displaying & Reading Trouble Codes

The Electronic Automatic Temperature Control (EATC) module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A New Generation Star (NGS) tester must be used to retrieve these concerns.
The EATC module self-test will detect concerns in the system control functions and will display hard Diagnostic Trouble Codes (DTCs) 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 at any time. Normal operation of the 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.
If a condition exists but no DTCs appear during the self-test, refer to the Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Improper Operation. See: Diagnosis By Symptom
To exit self-test and retain all intermittent DTCs, push the blue (cooler) 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 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.

 

A/C compressor is supposed to work in all positions except OFF, FLOOR, and VENT.

If the air is too cool, turn up the heat setting.

If it's too warm, turn it down.

Steve

 

My A/C has never worked in the "Panel/Floor" position, and I bought my truck brand new. The only positions it's ever worked in was "Max A/C", "A/C", "Floor/Defrost" and "Defrost". My dial is labeled, from left to right; Max, A/C, Panel, Off, Panel/Floor, Floor, Floor/Defrost, & Defrost. Is yours labeled different?

 

I am assuming you have the manual climate control, not the electronic control head. You didn't specify...

If yours doesn't run the compressor in PANEL/FLOOR, your selector switch is defective.

It is documented in the service manual, the electrical schematics, and the owner's manual (pg 62) that it should function as I described it provided the outside temp is high enough.

Steve

 

Well I musta bumped something, cuz it's workin now. Naver has before, and I thought it was normal, werks 4 me!

Thanks, maybe I should read my owners manual once in a while. hehehe! I wonder what else is or isn't workin that I don't know about.