2004 Lariat F150 - no longer blows cold, but lines are cold?
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2004 Lariat F150 - no longer blows cold, but lines are cold?
Background.
2004 F150 Lariat, climate control, etc.
Was working fine, blowing cold, etc.
My wife this morning was cold for some reason and turned the a/c up to 82*, and now the a/c is stuck blowing room temp at best, but really just warm air now.
Won't get cool at all.
One line is freezing cold as it should be (the top line), and the other line was hot as I understand is also normal.
Compressor runs when on, and does not short cycle.
I've read about a blend door issue, but is that a previous generation problem? Or do the 04's and up suffer the same. Also anyway to test w/o ripping everything apart?
2004 F150 Lariat, climate control, etc.
Was working fine, blowing cold, etc.
My wife this morning was cold for some reason and turned the a/c up to 82*, and now the a/c is stuck blowing room temp at best, but really just warm air now.
Won't get cool at all.
One line is freezing cold as it should be (the top line), and the other line was hot as I understand is also normal.
Compressor runs when on, and does not short cycle.
I've read about a blend door issue, but is that a previous generation problem? Or do the 04's and up suffer the same. Also anyway to test w/o ripping everything apart?
Senior Member
Joined: Oct 2002
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From: St. Louis (Out in the woods)
EATC Self Test 04
Run the EATC Self-Test as follows from the service CD:
Electronic Automatic Temperature Control Module — Retrieve Continuous DTCs
The EATC module will retrieve only continuous (intermittent and hard) DTCs when carrying out this procedure.
Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
To retrieve continuous DTCs, press the OFF and DEFROST buttons simultaneously and release, then press the RECIRC button within two seconds. All vacuum fluorescent segments will be displayed if there are no continuous DTCs present. Continuous DTCs are indicated by the presence of the degrees Celsius symbol (°C) on the EATC module display. Record all DTCs displayed.
If any DTCs appear, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
If a condition exists but no DTCs appear, GO to Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation.
To exit and retain all continuous DTCs, press any button except DEFROST. The EATC module will exit the retrieved continuous DTCs mode and retain all continuous DTCs.
To exit and clear all continuous DTCs, press the DEFROST button. The EATC module will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
Always exit the procedure before powering the system down (system turned OFF). Once the procedure is exited the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.
You'll probably end up with some DTCs related to the blend door (post your actual DTCs, I'll look them up.
Steve
Electronic Automatic Temperature Control Module — Retrieve Continuous DTCs
The EATC module will retrieve only continuous (intermittent and hard) DTCs when carrying out this procedure.
Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
To retrieve continuous DTCs, press the OFF and DEFROST buttons simultaneously and release, then press the RECIRC button within two seconds. All vacuum fluorescent segments will be displayed if there are no continuous DTCs present. Continuous DTCs are indicated by the presence of the degrees Celsius symbol (°C) on the EATC module display. Record all DTCs displayed.
If any DTCs appear, carry out the diagnostic procedure. Refer to the Electronic Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
If a condition exists but no DTCs appear, GO to Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation.
To exit and retain all continuous DTCs, press any button except DEFROST. The EATC module will exit the retrieved continuous DTCs mode and retain all continuous DTCs.
To exit and clear all continuous DTCs, press the DEFROST button. The EATC module will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
Always exit the procedure before powering the system down (system turned OFF). Once the procedure is exited the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.
You'll probably end up with some DTCs related to the blend door (post your actual DTCs, I'll look them up.
Steve
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Originally Posted by Lakepilot
Hey there projectsho89. I think I may have a bad module. If I pull the codes can you help me figure them out? Thanks!!
Steve
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Joined: Jul 2007
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Hey Steve,
I have a 2004 F150 Lariat with the EATC. I read the DTC's. I got 16 and 76.
The problem is it's not cooling very well. Blowing cool air and not cold air. It seems to blow cooler at times but not what it should be. Are these codes easy enough to know where to look next.
If I need to provide more info I can.
Thanks! for anytime you might have.
Mark
I have a 2004 F150 Lariat with the EATC. I read the DTC's. I got 16 and 76.
The problem is it's not cooling very well. Blowing cool air and not cold air. It seems to blow cooler at times but not what it should be. Are these codes easy enough to know where to look next.
If I need to provide more info I can.
Thanks! for anytime you might have.
Mark
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
That particular EATC fault code (1676) indicates the "supply voltage out of range".
Not particularly helpful as compared to your operational symptoms....
FWIW, I've noticed a substantial number of posts (here and elsewhere) regarding unsatisfactory A/C system performance in the 04+ models. I haven't been involved with any of those (haven't had a need to do the research yet...) so I'm afraid I'm not in a position to offer specific relevant advice.
This is one of those times where consulting a Ford dealer might be advantageous.
Perhaps some poking around in the 04 and up forum will turn up something.
Good luck.
Steve
Not particularly helpful as compared to your operational symptoms....
FWIW, I've noticed a substantial number of posts (here and elsewhere) regarding unsatisfactory A/C system performance in the 04+ models. I haven't been involved with any of those (haven't had a need to do the research yet...) so I'm afraid I'm not in a position to offer specific relevant advice.
This is one of those times where consulting a Ford dealer might be advantageous.
Perhaps some poking around in the 04 and up forum will turn up something.
Good luck.
Steve
Last edited by projectSHO89; Jul 17, 2007 at 12:03 PM.
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Hi Steve,
I apologize for not getting back as the problem has somewhat gone away but still happens occasionally.
I think you may be correct on the blend door issue.
(ps, Quintin, I should have corrected and said that my wife had set the a/c to 82* in the morning, and in the afternoon tried to get it back down to 60*, where it still stayed warm, sorry for the confusion).
After I posted this I went outside and set the a/c to full heat, I heard a sort of "swoosh" and then set it back to full cold 60*, and the cold air was back at full blast. Does this sound like the blend door issue I read about? It's ok for now but I imagine it will eventually get "stuck" in one direction or the other. If it happens again I can get that DTC code you mentioned.
How tough is this to tackle oneself (I have excellent mechanic skills), I imagine it requires complete teardown of the dash.
I apologize for not getting back as the problem has somewhat gone away but still happens occasionally.
I think you may be correct on the blend door issue.
(ps, Quintin, I should have corrected and said that my wife had set the a/c to 82* in the morning, and in the afternoon tried to get it back down to 60*, where it still stayed warm, sorry for the confusion).
After I posted this I went outside and set the a/c to full heat, I heard a sort of "swoosh" and then set it back to full cold 60*, and the cold air was back at full blast. Does this sound like the blend door issue I read about? It's ok for now but I imagine it will eventually get "stuck" in one direction or the other. If it happens again I can get that DTC code you mentioned.
How tough is this to tackle oneself (I have excellent mechanic skills), I imagine it requires complete teardown of the dash.