2013 Tundra AC issues - do I have a gremlin or something else?

2013 Tundra 66k miles (56k when I got it) I took over from my dad back in Feb of this year and have had quite a few problems since day one..

While driving back from CA, the truck would die overnight and would need to be jumped but worked throughout the day afterwards. Second day it died overnight again, jumped it, drove about 2 hours and then it died in the parking lot of McDonalds. Luckily, there was an AutoZone in the same parking lot and the battery ended up being shot and replaced it. Still had issues once I got home, and the battery terminals were corroded to hell, so replaced those with factory battery terminals.

Truck had been running fine after that up until about two months ago, when the A/C text (have an aftermarket T style HU) would start flashing and the A/C stopped blowing cold. Replaced the magnetic clutch relay and that seemed to make it work fine for about a week, then went back to blowing hot (not ideal for the start of AL summer). Took it to a shop and had them check it out, ended up there was no freon in the system and a faulty compressor. Had the compressor replaced and system recharged. A few days later A/C went out again, and then the serpentine belt decided to shred itself. Took it back to the shop, and they replaced the belt for free, since it was their error, but started to troubleshoot the A/C again. They concluded it was the AC amplifier, so had that replaced as well in addition to a faulty wire. A/C worked fine for about a month and now it is acting up again.. Took it back to them and they said to go to Toyota to look at it, since they thought it might have to do with "the electrical box." Toyota wasn't able to replicate the problems... At this point, A/C works fine in the morning, but when leaving work the A/C starts flashing again and blows hot air... Back to working again in the morning.. Truck is parked in a parking garage during the day, so it's not sitting out in the sun all day.

Anybody have this issue before? Or any idea of what might be a fix? These 105-110 heat index days are going to be the death of me without A/C

 

Change the relay