Engine Cooling problem
1997 Ford Escort 4 cyl Front Wheel Drive Automatic 85000 miles
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My wife’s car started over heating about a month ago. I found a bad cap and replaced. The problem did not go away. Checked the thermostat and found it broken and replaced that. I though I had the problem solved but do not. I drove the car for a while and found that it seems to overheat only when using the A/C. I started the car (cold) and the fan did not come on the turned the A/C on and the fan started and shut down when shut off. I then disconnected the temperature sensor and the fan came on although it seemed to come on in high speed. Is this correct and any directions to go in?

if AC system is overcharged that may lead to an overheat

fan should cool down the system
it sounds as its working fine
check water pump
do a headgasket test