Compressor cycles on and off

I say no. He's determined that it's cycling on the evap temp switch and not low pressure

Undercharged, the evap is not going to get the stat cold enough to cause this

Either what he's seeing is normal.........how often IS it cycling.......?

Or likely the stat itself is going bad

More on the stat? Not much too 'em. Read your shop manual.......it's a cap tube stat that has the tube in intimate contact with the evap coil

We need to see the pressures, ambient temp, and duct temp to make educated guesses..I agree that the capillary switch is probably the culprit if the charge is correct. tmm