As the title suggests I have recently run into an issue with my AC.

The A/C had been working fine since I purchased the car in Nov. 2008.

A week or so ago I noticed a couple of times that the thermostat setting changed to 78 degrees all by itself (I always keep it at 70).

Then shortly after, the A/C system stopped blowing any air through the vents. I could hear the fan blower blasting behind the front dash when I put it on high... but no air came out hot or cold.

Then a day or two ago turned on the car and now it is working fine and has been since.

I made an appt with the dealer.... but I fear it is a waste of time since everything is now working.

Any thoughts?