Close the valve so no more refrigerant escapes, then quickly connect the other end of the service hose to the LOW pressure service fitting on the A/C system.ĬAUTION: DO NOT connect a can of refrigerant to the HIGH side service fitting. This will blow air out of the hose (which you do not want in your A/C system).Ĥ. SLOWLY turn the valve back out to release a small amount of refrigerant into the hose. Turn the valve on the service hose to puncture the top of the can.ģ. Okay, now you can connect the recharge service hose and valve to a can of refrigerant.Ģ. Do NOT intermix different types of refrigerant. Use R-134a in R-134a systems only, and use R-1234yf in newer R-1234yf systems only. First, make sure you have the correct refrigerant for your vehicle. Late model vehicles with R-1234yf also have unique service fittings that are different from R-134a or R-12 systems.ġ. The LOW pressure fitting is SMALLER than the HIGH pressure fitting. On R-134a systems, the LOW and HIGH side service fittings are quick-connect style fittings. On older R-12 systems, the LOW and HIGH pressure service fittings are screw-type schrader valves. The HIGH side fitting is located on the line that goes from the compressor to the condenser. The LOW side fitting is usually located on the suction hose or line that goes from the accumulator to the compressor. There are two: a LOW side fitting and a HIGH side fitting. Next, you need to locate the service fittings on the A/C system. DO NOT use any type of flammable refrigerant (propane, butane or flammable hydrocarbons).įor more information, see Flammable RefrigerantsĬlick here for more information about retrofitting older vehicles with R-12 A/C systems to R134a. WARNING: Flammable refrigerants are illegal. Use the same type of refrigerant that is already in the system unless you are converting an older R-12 system to R-134a or another refrigerant. When older vehicles with R-12 A/C systems need refrigerant, they can be refilled with recycled R-12 from other older cars (this requires taking your car to a repair shop for professional service), or with an alternative refrigerant other than R-12, or with R-134a (which requires certain modifications).ĬAUTION: Mixing different types of refrigerants is NOT recommended. R-12 is no longer available to do-it-yourselfers (although some bootleg R-12 of questionable purity and quality is still coming into the U.S. On most 1994 and older passenger cars and light trucks, the original refrigerant was R-12. For these applications, use R-1234yf only, never R-134a. Starting with model years 2014-2015 a growing number of vehicles now use a different type of refrigerant called R-1234yf. Refer to the A/C information decal under the hood to make sure your A/C system is a R-134a system. DO NOT use any other type of refrigerant in these vehicles. On 1995 and newer passenger cars and light trucks up to about 2015, the correct refrigerant is R-134a. Next, you need to figure out what type of refrigerant your vehicle requires: The chilling effect of spilled refrigerant can cause instant frostbite on bare skin or eyes! Also avoid skin contact with refrigerant. A/C RECHARGING PRECAUTIONSįirst, wear safety glasses to protect your eyes. This can usually be done with a few cans of refrigerant and a simple service hose connection. If your air conditioner is not cooling well because the system is low on refrigerant, recharging the system with refrigerant should restore normal operation. How To Recharge Your Car's Air Conditioner by Larry Carley copyright 2022 Auto Repair Library, Auto Parts, Accessories, Tools, Manuals & Books, Car BLOG, Links, Index
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