Ac gives out then van overheats

overheating? low oil in crank case?low coolant ,maybe have catalytic converter checked if smells like rotten eggs!!!

YOUR FAN FOR THE AC IS NOT WORKING THE FAN HAVE TWO SPEED 1 FOR NORMAL COOLING AND THE OTHER FOR YOUR AC CHECK AC FAN RELAY IS THAT IS GOOD CHECK FAN MOTOR AND ALSO CHECK CONNECTION ON FAN MOTOR

coolant blockage or water pump

The charging adapter will only connect to the right (they are different sizes) port, it is coded, that port is in the low side line from the AC compressor.

if oil level is ok, your oil PRESSURE is dangerously low.
Either the wrong oil was used, or your oil pump is going bad.

Ill bet on wrong oil since you just had it changed,

have you alternator checked and, your battery recharged

remove the serpentine belt, then start the engine and listen for the noise. if the noise is gone. then you have a accessory going bad. ( i.e. ac compressor, water pump, belt tensioner, idler pulley...etc..)

try a coolant sensor or a new van

You either have a bad relay, bad temp sensor, or bad PCM. I would start with the relay as these give the most problems.

I just had my coolant flushed and my radiator cooling fan replaced. The car was slightly overheating and would "gargle" in the coolant bowl after I turned the engine off. It turned out to be the radiator was clogged up on one side.

I went full tilt and replaced the radiator, water pump, thermostat, radiator cap and timing belt. I have 85,000 miles on the car and it was about time to do these things anyway. It is running like a new car now.