Do you know where the coolant temperature sensor would be for a 2014 Buick Verano? ThanksI had this problem intermittently. It was solved by disconnecting the coolant temperature sensor connector and spraying it with electrical contact cleaner (deoxit). Reconnected it and everything works as it should. Finally getting consistent readings on coolant temp and ac works. Hope this helps.
Note: it came back again after about 3 weeks.I figured out this issue on my 2010 lacrosse. It only happened in the winter time for me. As soon as I had warmer temps the issue goes away. Pay really close attention to the coolant level. You cannot see the exact full level really well, it looks to be at level however Inside the overflow is a sensor. If that sensors is exposed at all you get the error. I literally added about 8 ounces or so of water to cover that sensor. Problem went away on my next drive and has not returned so far. Good luck
My starter went last week. Now I'm having the same issue. My dash is saying engine hot a/c off. I've put over 2000 in my enclave over the last year. Now my motor mounts are bad.I do appreciate that! I’ll check it when I can. Bigger problem now, my starter just croaked. Im over this crap already