First post, of course when I have a problem. I have both a 13 and 16 C-max in the family. Both are SE models. The 16 has developed an AC issue which (at least so far, 4 visits I believe) the dealer has not been able to resolve. The 16 is my daughters car which she traded for after going thru the transmission issues with a 14 Focus. As one can guess she is not very happy. Initial issue was a freeze up (lost air flow), and after finally convincing her to turn of the air for a bit it worked for the rest of the trip. Now it seems to be an outside air temperature issue. I don't have a good idea where the temp break point is, but believe it is somewhere around 80 degrees. The car never looses air flow now, but will not cool at all above that break point temperature. As I said she has had it in at least 4 times for the issue. The service writers verify that the AC isn't working. Service tech gets the car (and checks out the ac in an air conditioned shop) and can't find anything wrong. I did witness this happen also the one time we were with her when she took it in for service. Lives 200 plus miles away. 90 degree day, ac wasn't cooling at all from the moment we got in the car that had been sitting all night. Pulled it into the air conditioned service bay and while not great cooling it appeared it was working. Doesn't make much sense to me, but puzzles me why the tech can't find the issue. Could this be the Temp sensor. I am sure the dealer doesn't want to change parts unless they can verify the issue. I did point them to the TSB, of course they said it did not apply to the 16's. Any help would be appreciated, it's headed back to the dealer tomorrow, and she would like to have it fixed before the weekend. Has to make the trip home for a wedding she is in, be nice to have AC for the excessive heat wave predicted for our area. I can change the sensor myself once I have access to the car if you think that would be a good first step. Thank you for any help!!!
