1998 Jeep Wrangler AC problem

I have weird problem with the ac on this jeep. in the mornings when it is cool the AC will work fine. However when it gets warm about 70+ the ac no longer work and the compressor will not cycle. I have replaced the high pressure swith and the cycling switch. I have checked all connections, fuses and relays and all of them check good. Any Ideas



Thanks

I have the same symptoms in a 95 Cherokee. When temps are reasonable the compressor cycles normally, when its hot (90+) it is difficult to get it to restart cooling. I will turn it off for a few minutes & about 1/2 the time the compressor will then kick in & the cooling starts again. Maybe when the temps cool down THEN someone will answer this. :^)