[JRTJH]

I'm not sure if there is a problem with the A/C units or not. You say the inside temps were 80-82 and the thermostat was set at 79. Depending on air flow by the thermostat, that looks to be pretty close to within limits. I've always had a couple degrees difference between the thermostat setting and the actual interior temperatures.

Possibly you could turn the thermostat down to 72 and see what the inside temp drops to? Also remember that if the thermostat fan switch is set to LOW or to HIGH the fan runs continuously. It will only cycle off/on (with the compressor) if the thermostat fan switch is set to AUTO.