Got the wife's car back from the stereo shop. I never drive it, so I don't know if was doing this before or not, but the air conditioner won't turn on. I know it worked months ago in warmer weather. When I press the AC button, the light blinks three times. Even with the temp on the coolest setting, the air coming out was very hot.
Saw a post suggesting a failed temp sensor will falsely trigger some kind of overheat mode which disables AC, but the DIC shows a coolant temp, so I don't think that's the problem.
I tried the reset procedure in the post linked below, but it didn't do anything.
Intermittent Air Conditioning?
Any suggestions about troubleshooting this?