CAR HAS NO AC AND WILL OVERHEAT

Most often caused by a bad fan relay. This is a complicated system. Read the post below and download the GM wiring diagrams. Then check the fuses and relays. All 3 relays must be in perfect working order for the system to work properly.
Car overheats Ricks Free Auto Repair Advice

coolant temp rising indicates a faulty viscous fan hub
if turning the ac on cools it a bit that is because the ac fan for the condenser is moving air through the radiator and assisting the engine fan

sensors......Water temp sensor, air flow temp sensor, MAP sensor, Idle speed control solenoid, throttle position sensor, O2 sensor.........
Engaging AC draws on power from your motor, resulting in the ECU having to compensate to keep revs stable. Increased revs result in increased air flow, water flow, fuel flow & exhaust emissions.
Check belts for your AC pump first, as the same belt may drive your water pump. If it slips under load when the AC is on, ..................... Say no more. Next replace Water temp sensor. No luck..... ISC solenoid....
.

Hi Reggie, I'm glad to help. TWO things I want you to check. ONE: You have changed out a lot of stuff, so you may have air trapped in the cooling system, you'll need to remove the radiator cap and let it run until your at operating temperture, while watching to make sure it doesn't overheat on your of-course. If after running the engine say 30 minutes and topping off the coolant if needed, it still runs hot. Move on to: TWO: If you have the electric fan, some do, some don't. If it is electric make sure the fan is coming on, if it doesn't come on then you have found your problem, replace the fan assembly. Hope this helps and have an awesome day Reggie!

Start by checking to make sure that the a/c condensor and radiator is not full off debris. If the condensor and radiator were full of debris it will limit the air flow from the engine cooling fan which in tern will cause a high discharge pressure on the discharge on the a/c causing poor or no cooling at idle and could also cause vehicle to overheat. Check and make sure that the cooling fan as well as the condensor fan are coming on together when the a/c is turned on if equipped with 2 fans.

It sounds like your AC unit could be overheating or even damaged.

AC units have a sensor that will turn them off automatically to prevent damage from overheating. If there is an insufficient amount of air flow, the unit will heat up, and then eventually turn off.

When the car is moving, more air is forced over the unit, likely keeping it cool enough to run, however, when the car come to a stop, it loses that air flow, and quickly heats up. Thus, the AC would work while the vehicle is in motion, and overheat and stop when the car is stopped and idling.

However, the AC unit could be completely blown. The cold air while moving could be just a case of air being forced into the car. Think of a house fan, the fast the wind blows on you, the cooler it gets.... Thus, it could be an illusion that the AC is working when car is in motion, when it really isn't.

Hope this helps.

Have you replaced the thermostat as this could be sticking and causing your problem. Also i see you have flushed the rad but you still may have a blockage get a radiator shop to check flow rate

The radiator fan is not spinning. Car overheats when idling with no air flowing through the radiator fins.

When you are driving, there is enough air flowing through the radiator fins to keep the Saturn cool.

1. Check the radiator fan (cooling fan) fuse.
2. Check the radiator fan electrical connector. It may have vibrated loose.
3. *sigh* .. replace fan motor....

If you need instructions on how to replace fan motor , please comment.
Just don't let the fan scrape against the radiator when you are removing / rfeplacing the motor.

Hope this helps ... and it's just a fuse.

The Temp gauge should read in the middle of the gauge at operating temperature. This is normal. The radiator fan should come on after idling (not driving) for 20 minutes. The fan should also come on when you turn on the AC. Are you experiencing overheat problems?
Please reply if you have overheating issues.

if ac dont work idleling it start to work when you move our fan is not coming on because when you activate the ac compressor kick in and fan should come on if it start to be cold only when you drive the force air cool the condensor ac work temp goes down HOPE IT HELP FIXYA OUR POST THANKS . PIERRE