Last post on Nov 18, 2013 at 1:42 PM
You are in the Ford Expedition
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Ford Expedition, SUV
#24 of 236 Re: 2002 Ford Explorer Rear Air Conditioner Problem [wrencher]
Jun 29, 2007 (11:52 am)
I have a 2003 expedition and found that you are correct about the set point problem. I took a my unit apart (broken gear also) and determined that when the temperature knob is set to full hot (5 o'clock position) the control voltage from the knob is about 0.15 volt. when full cold (7 o'clock) it is ~12.0Volts engine off key on or about ~14.0 vdc engine running. This causes the servo loop for the door motor to try to keep turning against the stop when cold position is set. The issue stops if you set the temp knob to the 10 o'clock position from cold. From all this I determined that the motor doesn't like the control voltage to be more than ~10 VDC. To alleviate this problem I calculated from the internal resistors used in the unit that one can add a 75,000 ohm resistor externally in series with the control signal wire on the 8 pin connector that leads to the hot/cold motor. The wire is one located closest to the white connector key way. The other 2 wires are for the battery key on voltage and ground. To order a new unit from ebay look at item 200116596985 ford # YL5Z-19E616-AA. I just ordered one from this seller on ebay. I will test it on the bench before I install it to make sure it behaves like the original and report back that it needs the 75,000 ohm resistor also.
#25 of 236 rear a/c warm
Jul 08, 2007 (10:55 am)
Help!! Do anyone knows where the a/c recharge port is located on 2002 ford expedition, Thanks in advance
Jul 08, 2007 (3:17 pm)
The rear A/C problems discussion has been merged with this general A/C questions topic.
SUVs and Smart Shopper
#28 of 236 Re: Rear Air Conditioner thumping noise [lhwill]
Jul 12, 2007 (7:39 am)
Yes I had the same problem and the dealership fixed and a little over a year later it is doing it again. And ofcourse now they will not fix it because it is not under warranty, even though I had the same problem before and they supposedly fixed it. So be prepared for it to break again. I was told it was some kind of recall on the original visit but now they deny this fact and said there is not. Kind of odd that several people are having the same issue! The part number given in the other reply is correct. That is what is on my receipt and it is called the A/C Door Actuator (Temperature/Blend) So now I guess I will either get rid of the vehicle or go buy the part and do it myself, I am not paying over $300.00 for them to fix something they have already fixed. It is pretty upsetting!!!!!!!!!!
#29 of 236 A/C changes air flow from front panel to defroster
Jul 22, 2007 (8:00 am)
I have a 1997, 5.4 Expedition. Whenever the RPM's increase (climbing a hill, causing the transmission to drop into a lower gear) the air condition air flow changes from the front panel to the defroster. As the RPM's decrease, the air flow reverts back thru the front panel. I'm stumped.....
#30 of 236 A\C Air flow changing problems
Jul 22, 2007 (5:13 pm)
Your problem is in the vaccum line that runs from the firewall to the ari mixture controls behind the dash. More than likely its in the hose under the hood at the firewall. You can just cut and replace it there. Inspect the line good and see if you can find any cracks. It just takes a small crack for this to happen. It is located between the battery and the firewall. It is a very small "spaghetti" tube. Hope this helps!
#31 of 236 Re: A\C Air flow changing problems [traderdaddy]
Jul 22, 2007 (6:09 pm)
Thanks, I'll take a look and let you know if this fixes the problem. I do appreciate the help!
#32 of 236 Re: A/C changes air flow from front panel to defroster [bpartain]
Jul 24, 2007 (1:30 am)
There should be a vacuum check valve and reservior also to store vacuum for medium to hard acceleration conditions to the vents dont go to "default" defroster mode when vacuum is low. YOu need to especially verify the check valve is not stuck open or leaky as this will cause the AC vents to act like you are decribing. A leak in the reservior can also cause problems.
#33 of 236 Rear AC blows hot
Jul 29, 2007 (8:37 pm)
I have read through these posts on the rear air issues but still dont understand totally on how to fix my problem. I have '03 Expy that blows hot air in the rear only. I understand that some parts can be replace without going to the dealership. My question first is where is the rear ac components loacated so that I can see what needs to be replaced?