Im having a hard time finding the right answer to my issue. Ive searched and searched. So as the title states, when running the A/C the driver gets nice cold air but the passenger gets hot air but the setting is on cold. Ive tried selecting dual temp and also single temp and that doesnt seem to matter.
Can someone point out what needs to be examined to get an accurate diagnosis on this?
It can be several problems, but here was mine! I chased the exact same issue on 2009 EXP EB with dual air. Mine was erratic and sometimes clicked! I removed both of the blend door motors (pax/driver side). I found both were NOT is the same index position as the two new MOTORCRAFT motors I ordered, AS REMOVED!!!! (NOTE: when you turn your EXP off, both motors return to the same POWER OFF position. There is a circuit INSIDE each motor that sends a signal to the PCM to let it known the index position of each of the motors/doors! Both are attached to the left/right blend doors which in turn tell the PCM each doors position ~ OPEN or CLOSED. I also noticed a ton of grease on the copper position circuits inside. My assumption was the grease was causing an erratic electrical connection and thereby confusing the PCM with false door position indications. The PCM also uses this same position circuit to send power to the motors/doors to position them in OPEN or CLOSE as directing by operator input and other settings (temp/dual air on/off...etc).
I replaced both and BINGO! Everything went back to NORMAL OPERATION! $34 each for OEM AMAZON! well worth it. This job can be done at home, but it takes a good mechanic with patience and tool and hand skills! It an be done in 5 minutes per side ONCE you learn how to do it. IT may take you all day the first time!
NOTE: The most common cause of failure is the tiny toothed plastic gears inside the motor that break and lose a tooth. Mine were NOR broken.
My removed units make be good (after removing all that excess grease, but I did not take that chance!
You may have a broken tooth in one blend door only.
You may have a broken vacuum line between the blend motor and the one way check valve on the pax side firewall/engine compartment.
You may have the same issue I had.
I suggest you remove and replace the blend door motor from the side that is pushing warm air vs cold with AC on.
If no help, change the other side as well!
Here is a great link on the pax side removal EB with Dual Air.