Is the switch that turns on cooling fans the same switch that turns on the air compressor i just replaced compressor and other parts and had it vacumed out ,oiled and recharged . and compressor wont

Try unplugging the air conditioner compressor under the hood. There should be a plug near to its pulley. With the compressor unplugged, try turning the fan switch to AC again & see if it still blows the fuse. If it does, there's a problem somewhere in the wiring between the switch and the compressor. If not, the problem is in the compressor's pulley clutch.

The cooling fan is controlled by sensors in the cooling system so providing that you can move the fan blades easily and you have current getting to them I would be having a code reading to check for failing sensors. As to the a/c problem the compressor operation is controlled by 3 switches 1 switch is the heater fan must be on as well as the ac switch --2 is a switch that turns the compressor off if the head pressure is excessive and 3 is a low pressure switch that turns the compressor off if the pressure is too low (no gas). have a ac mechanic check out the system for leaks

check and make sure the a/c compressor is turning on when the a/c is turned on. if it is then make sure the cooling fan comes on, if the compressor is not working then you may have a faulty low pressure switch, you can unplug the electrical connector and test the harness side of the connector by jumping the 2 terminals using a paper clip to see if the compressor turns on. if the cooling fan is not turning on it will cause the a/c system to not operate to reduce the chance of the vehicle overheating when the a/c is turned on. hope this helps

The only other thing then would be if the compressor is turning, engaging, and the cooling fan working properly. You should either be able to see the compressor clutch engage, as the switch is energized, or at least hear it click loudly when the switch is energized. If it is not, then there are sensors for the low pressure/high pressure line to tell the compressor when to function, that also have to be checked.

As the engine runs with the compressor turning, one line should be hot/warm, the othe,r (larger diameter hose) should be cool/cold, if the system is working properly.

If the compressor is turning when you have the A/C turned on, then see if the cooling fan is running as well. It must run to remove the heat and cause the process to function properly.

Good luck!

HIGH PRESSURE CUTOFF SWITCH LOCATED ON AC COMPRESSOR DISCHARGE LINE LEADING TO THE CONDENSOR.THE HIGH PRESSURE CUTOFF SWITCH WILL CUT OFF THE AC COMPRESSOR IF SYSTEM PRESSURE RISES TO HIGH CAUSED BY RESTRICTION IN THE REFRIGERANT CIRCUIT OR OVERHEATED CONDENSOR.MAKE SURE COOLING FAN IS RUNNING WHEN THE AC SWITCH IS ON.THE COOLING FAN KEEP CONDENSOR COOL, IF COOLING FAN DONT RUN.YOUR AC WILL STOP BLOWING COLD AIR.HAVE THE REFRIGERANT SYSTEM CHECK OUT.MAKE SURE YOUR LOW SIDE PRESSURE IS 10 - 37 PSI. THE HIGH SIDE PRESSURE SHOULD BE 112 - 210 PSI. CHECK THE AC COMPRESSOR CLUTCH FUSE AND RELAY.

After a jumper test on the fans to make sure that they work, you might take a look at your coolant level or temperature sensor. The try testing or replacing any fuses or relays wired into your air conditioning and heating circuit. In my 1998 Buick Regal, the fans never run until the air conditioner or heating fan is turned on. Unfortunately, the A.C. compressor and the cooling fans also kick in when I turn on the heater fan switch. Your best option is to wire the fans to a manual switch on your dash or just drive really fast all the time.

Compressor could not work without cooling fan comming on.
Check compressor mounting bolts and belt placement on pulley regarding the noise.
But before we get to the a/c system repairs its important to have a properly working cooling system.

Is the car overheating ? It should if neither fan works.
If I recall correctly the fan switch is usually on the upper radiator hose coupling.
you may want to test the fan(s) its self. Remove the electical connectors fron the fan(s) , fabricate a set of jumper wires and run it from the battery. If this works the fan(s) are ok . If it doesn't replace the ones that don't work.
The coolant switch aka fan switch is usually tested with an ohmmeter . Use shop manual for testing procedure.
Test the a/c fan and engine cooling fan relays. (see shop manual for details)
Then I would start looking at coolant( correct mixture and thermostat) although the thermostat is not likely to cause this.
If all of this still doesn't correct the problem it may be the ECU that monitors this system it may not be responding to the signal /voltage from coolant temp sensor to turn on the fan, (again nedd shop manual to test this)
Once you have a properly working cooling systemnow you can turn your focus on the a/c. Compressors either work or they don't.For you safety I recommend having the a/c system serviced by a ASE certified Technician or a tech's who legally can perform a/c service. Good luck

if the fans are working , it seams like the compressor is not turning on, check the low pressure switch on the acomulator, at the passenger side in the engine compartment, try wiggling the connector , that switch is very common to fail in the GMs that year, another thing find an auto-part or walmart close to you and bay one of this bottles of freon with a gauge and check if there is freon in the system , if no just put some untill the compressor come on by it self and you fill the cool air inside the car..hope this help

the missing part could be the cover... its ok , not cooling very well could be:-
1, aircon fan not working
2, system need to be service
3, need to add air-con gas

for air-con works only in full position.... need to change the switch.. its faulty.

Could be a couple things - one, if the fan switch for the AC condenser is not working, it'll keep the AC from kicking on, but that's usually seen by the compressor not coming on. When you activate the AC, do your RPM drop down at all? It should. If it does, the compressor is kicking on and you probably have a problem with the expansion valve, which is what flash chills the air. The car is pumping freon around but it's not cooling enough to cool the car. That's likely an expansion valve problem.

If you turn it on and the revs don't dip down momentarily, the compressor isn't coming on, and it could be the fan switch underhood or the AC relay.