Supercrew0202

I'm having intermittent problems with the A/C on my F150 Supercrew. The truck has 218k miles on it, and whenever the temp gets about 85 degrees or higher, the A/C will cut out after a few minutes. If I turn the climate control selector switch completely off for a few minutes then back on, it starts working again. I checked the freon levels and they are within specs. I do know when the A/C quits, the clutch disengages and will not come back on without cycling the blower off. I have also noticed the connector going to the blower moter gets really hot, as well as the A/C clutch cycling relay. I swapped relays, but that didn't help either. Another weird thing is when the truck is parked with the engine running, the A/C doesn't seem to cut out, but as soon as you start driving, it does. Any suggestions?