This is one of those issues that I can leave the truck with the mechanic to fix and after having it for a few days he will tell me everything is fine and he had didn't see any issues. Intermittently the air conditioning will just start to blow hot. Seems to happen at random regardless of how long I would be using AC and what temperature it is outside. AC blows hard and cold all other times. I put 1500 miles on the truck and probably 24 hours of driving the past weekend and the issue happened 3 times. Truck is digital climate control so I almost think this is a sensor related issue.