Problem with the cabin air temperature sensor?

[rbrown6061]

2007 Expedition, Eddie Bauer model. AC blows cold (lowest temp at the vent is 48 degrees). Heater works great, and I can control the temperature of the HEAT via the individual/digital temperature settings (driver or passenger settings) on the console. What I CAN'T do is control the temperature of the AC via changing those same digital settings. (Basically no matter what temp the driver/passenger temp settings are set to, even after pressing "Auto", the AC blows at 48 degrees). I already replaced the blend motor actuator last year, so I'm fairly confident that isn't the problem.. and I can control the heat temp. My best guess is the cabin air temp sensor? (Ford part number YH479) but I can't figure out WHERE this is? Thanks for the help!

 

[stamp11127]

Don't see that name on the component list but the evap temp sensor is located on the top center of the plenum box.

 

[rbrown6061]

Stamp11127 - thanks.. I was only guessing as to what component/sensor it could be.. Do you feel strongly that it could be the "evap temp sensor"? Forgive me for asking, but, I'm assuming the plenum box is inside/behind the dash? Just thought it was strange that I COULD control the amount of heat at the vent via changing the digital controls - but NOT the temp of the AC air.. Maybe two different sensors/systems? Final question (for now) please: Is this something I could change myself as a layman mechanic - or is this something best left to the dealer or real mechanic?

 

[stamp11127]

Access it through the glove box door. Once it is lowered and out of the way you should be able to see it on top of the box.

 

[Jeff Tarry]

Where do I find my Cabin Temp sensor on my 2003 Expedition? YH479 is the part number