I have a 2012 Chevy Equinix. 120k Miles. Bought it new. From early on sometimes when we would turn the A/C on it would not blow cold. But if we would take the temperature control knob and turn it from cold to hot and back to cold fast the air would start cooling. We would only have to do this like once or twice a summer. Fast forward to a few weeks ago and this time when we did our little trick it wouldn’t fix the problem. But if we did our little trick maybe 5 or 6 times in a row it would fix it for a day or so. Then that stopped fixing it. I read someplace to pull the HVAC battery fuse for a minute and then plug it back in. Once the fuse was plugged back in you could hear something happening in the dash. The first time I did this fuse trick, the A/C worked perfect for over 2 weeks. Then the issue has returned. This time pulling the fuse and plugging it back in only fixed it for a few minutes. However when it stops working and I turn the A/C off and then back on 10-20 mins later it will start cooling again or sometimes it will just start cooling again on it’s own if I leave it on with it blowing the hot air. Very frustrating. Here is something else to throw into the mix. When this started happening again a couple weeks ago, I noticed the outside temperature that is displayed on the radio screen was off by 10-15 degrees and then when the A/C would stop cool and blowing hot air, the outside temperature displayed would drop down to the negative number so. Like it was 20 below outside when here in Vegas it was 100°. I’m stumped. Obviously the compressor is working because it worked fine for 2 solid weeks after this issue started happening and with the ambiant air temperature being wrong I’ve got to believe it’s an electronic part going out. Any help or ideas is greatly appreciated!