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Sometimes yes, you will need to jump the cycling switch or also called the low cut off switch, this is located on the filter dryer,a quick note, if the system has air or moisture in it and you charge it you may get cold air to blow but will cause damage to the compressor over time and cause it to go bad. the correct way is the evacuate the system and then vacuum it down and then fill with some oil and fill with the correct amount of freon,without gauges its hard to know if you are adding the correct amount and this causes damage over time, just because its blowing cold doesnt mean it fine, good day, hope this helps.
This job requires special tools and special training. If you lack either, you risk SERIOUS personal injury. Injury comes VERY EASILY! You need to address oil levels, proper and legal refrigerant recovery, system evacuation, and recharge. You were planning to also replace the receiver/dryer, correct? It also needs the oil in it measured and incorporated into the amount of oil (in %) that would need to be added. FAILURE to address these and other issues will guarantee premature system failure and likely compressor damage. Take this job to a qualified shop.
I have never seen a Saturn which did not have air conditioning from the factory. However a special ordered one may well be out there running around without an air conditioner. Just because one had air conditioning, does not mean the cooling still works. If you have a 99 Saturn the system may well be there, but needing repair or just a recharge. Instructions to operate a functional system are self explanatory from the labels on the controls but further light may be obtained from an owner's manual.
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.
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.
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.
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.
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
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.
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.
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
Must be Air-Condition System Lines/ Hoses leaking R12 Freon (gas). MAYBE THE PULLY HUB BEARINGS FAILED OR DUE TO VERY LOW R12 FREON (GAS ) will not work. Because there is a switch in the receiver/dryer prevent AC from working when low R12 Freon present, to protect the system & compressor damages. You must fix the leaks, before recharging it. They must **** the old (residue) gases from the system & lines / hoses...... & stay in the vacuum pump 30 minutes to proof no more leaks. Recharge some oil for the old type R12 Freon gas. Before recharge it to 62-67 psi R12 Freon See the web site like www.youtube.com/video site to see How they service & repair air-condition system? Put the question to their search window. This is the question u should. How they service & repair air-condition system? Regards; MAR
It shoud have R134a, I would use a recharge kit. If you have a slow leak this will only be a temporary fix. They usually sell a kit with a dye inside the can, If you use that you should be able to locate where the leak is.
The first thing that needs to be done is to have a vacuum pulled on the system,(It needs to be pulled down to at least 0 mmhg's) Then depending on whether it's R12 or 134A,The system can be recharged.The only way to know that you have the correct charge is to evacuate, vacuum, and recharge by weight.The total amount of refrigerant required is 1.7lb. However you have problem, Since the system was empty there is air in it and until this air is removed,the system will not function correctly. So
Vacuum (the vacuum should be left on the system for at least an hour to check for leaks) If no leaks are found.Go to step 2
Recharge system by weight (1.7lbs for empty system with vacuum pulled)
You take your car to the nearest licensed automotive A/C shop and have them evacuate the system and recharge.
I'm saying this because once you have opened the system, you have let moisture into it. Even a small amount of moisture will damage your A/C system, and needs to be removed. Also, they will know just how much refrigerant to put into the system once it is moisture free.