[RonMe]

Sorry, but what does the indicated outside temperature have to do with the a/c system? That reading from the outside sensor under the front bumper is not connected to the interior climate controls at all. It's purely an outside reference display for information only. For automatic climate control, the sensors for the interior cabin are up in the dash and front console. And the outside sensor reading can be calibrated by the owner (page 92 in the 2015 sedan owners manual).

Many vehicles use the outdoor ambient temperature sensor to sense whether the a/c should be operating. If it malfunctions or is disconnected, the ECU treats it like it's cold and won't allow the a/c to blow cold. It makes most sense really, but this is a fact on some vehicles. One example: On a 2013 Jetta, if the sensor is unplugged or broken, the A/C will not work, no matter what the outside temps are.