Air conditioning not working on 1998 oldsmobile achieva

The low and high side valves are located under the air filterbox, if you open the hood and remove the air filter box you will see the valves ,good day

the condenser is located in front of the coolant radiator, in front of the car.

Why do people guess, this is what you need
93-92 Olds Achieva All Eng. ....... R-12 42.00 oz Mineral 8.00 oz
Vacumm the system to remove all moister and air (this is a must), I have converted many systems that were R12, with out change anything but the PORTS to allow R134 to charge the system and had no problems, always use high and low gauges, and a temp gauge inside the cars vents, this allows you to see what temp the air is coming out of the vents.
Add enough freon to bring the high side up to 150 psi, this will activate the cooling fan, check the inside temp. add a little at a time till the inside temp drops below 60 degrees, I have been able to get R134 down to 36 degrees, it depends on the systems condition. test drive and be cool.
Good luck

Hi, determine if your car uses R134 or R12 refrigerant. You will notice screw type connectors on the both the High Pressure Side and Low Pressure Side lines in models using R12 refrigerant. R134 compatible models have quick connect valves on both sides. Models made before 1995 may use the old R12 refrigerant. If this is the case, you must have your Chrysler's air conditioning system retrofitted to use R134 refrigerant. Mixing R12 and R134 refrigerants is dangerous and may cause damage to your vehicle. Check your air conditioning system pressure using an automotive air conditioning pressure gauge. Keep in mind that in order to get an accurate reading, the air conditioner has be turned on the coldest setting with maximum blowing power. Remove the Low Pressure Side port valve cap and set it aside. The location of the port varies, but it is usually in front of the engine block. Attach the refill hose to the port on the Low Pressure Side of the air conditioning system. The Low Pressure Side port is smaller the High Pressure Side port. Because the ports are different sizes, the refill kit hose should fit only on the Low Pressure Side port. Additionally, the High Pressure Side port will usually have a red cap or be marked with an H or the word High Allow the air conditioner to **** the refrigerant out of the can by slowly turning the valve on the refill kit hose. Pay attention to the way you hold the can. Most kits will have you hold the can upright when you recharge the air conditioning system. It may take as long as 10 minutes to empty a single can. Turn the valve to the off position and remove the refill hose from the port. Recap the port before closing the hood. Let the air conditioner stay on for at least 30 minutes. This allows the refrigerant to move throughout the entire system.
Take care

1998 Oldsmobile ACHIEVA Recall ID from NHTSA: 04V036000 http://www.autobuyguide.com/1998/12-aut/oldsmobile/achieva/recalls/index.html the link will take you to a detailed description of the recall.

Jeep GrandCherokee SUVs manufactured in or before 1995 use R12 refrigerant. You must retrofit these SUVs to accept R134 refrigerant using a retrofit kit available at your local auto parts store before you can recharge the system. In some areas, a license is required to retrofit an air conditioning system. If this is the case in your area, take your Jeep to a professional to retrofit the system.

Instructions:

1. Step 1 Take your SUV to a mechanic to recover the R12 refrigerant out of the air conditioning system. A license and special equipment are needed to do this. Because R12 refrigerant is expensive, many mechanics will do the job for free.
   
2. Step 2 Locate the Low Pressure Side connector port. You will find it on the driver's side of the engine. Remove the blue or yellow cap marked L. You only need to retrofit the system if you see a screw-type connector valve. If you see a quick connect valve, the system already is R134 compatible. Wipe the connector valve off with a clean towel. This ensures that the retrofit connector properly adheres to the valve.
   
3. Step 3 Place the long retrofit connector from the automotive retrofit kit onto the Low Pressure Side valve. The retrofit connector has a special adhesive on the threads that will help it adhere to the valve. Screw the connector onto the valve. Tighten the retrofit connector using an adjustable wrench. Place the cap provided in the retrofit kit onto the retrofit connector. This keeps dust out of the system.
   
4. Step 4 Follow the air conditioning lines away from the compressor until you see the High Pressure Side port valve. This is located near the Low Pressure Side service port. Remove the red cap and wipe the port off with a towel.
   
5. Step 5 Put the shorter adapter onto the port. Twist it using an adjustable wrench until it is securely fastened to the port. Place the red cap from the retrofit kit onto the adaptor.
   
6. Step 6 Fill out the Retrofit Identification sticker provided in the retrofit kit using a permanent marker. Remove the protective backing and place it on the interior side of the hood. This lets future owners and service professionals know that the system has been retrofitted.
   
7. Step 7 Recharge the air conditioning system. See the related eHow titled "How to Recharge Air Conditioning with Freon in a Jeep Grand Cherokee."
   

WARINING:
Never try to evacuate the system yourself. A license and special equipment is needed to evacuate the system. Attempting to do this yourself will release refrigerant into the air, which is a federal crime.

Good luck (rated this help).

There are a lot of products out there for recharging cooling systems. R-134a is the current coolant that is being used. Wal-Mart and most other parts stores will have an easy to use recharging kit built for r-134a ready systems (a 1998 would have the proper seals and oils).

they might be on the compressor itself,with silver aluminum caps on them ,that unscerw ,otherwise follow the lines, they have to be there somewhere

The system may need to be recharged, All A/C system will have small leaks though the seals and when you lose enough R134 the system will stop blowing cold air. I am guessing that it stop working now as to that there is no cold air but the blower fan is still working right?? Or do you mean that there is cold air and then it stops making cold air after 50 miles but will work again after a few hours of the can not running. If that's the case, the A/C relay may be bad and when it heats up the relay fails and needs to be replaced. Good luck and keep me posted.

Sounds like the A/C system just needs to be recharged. When was the last time you had this done? Just take it in to your mechanic and he can do it for you and if that's not it for some reason, then he will be able to find the problem but most likely you need more freon added.

Benjamin