I have a 2008 Expedition Limited and just in the last few days the a/c will blow hot after idling for 5-10 minutes in the Texas heat. I've also seen the engine temp gauge get up close to the red then cool back down then other times stay high. I shut the car off as soon as the temp gauge got up and then immediately restarted the car and the temp showed to be perfectly normal?? As for the a/c the clutch is not engaging when its blowing hot if I hold RPM's at 2k it kicks back on. Any help is really appreciated!