Refrigerant leaks can cause the system pressure to drop and the A/C compressor to shut down. The procedure will only work if your system has a small refrigerant leak.
How to Recharge A/C Refrigerant on a Hyundai
What you will need
R134a Refrigerant Recharge Kit
Work Gloves
Safety Glasses
Procedure
Park the Hyundai. Set the parking brakes, place the gear selector in Park, and allow the engine to idle.
Turn the air conditioner ON. Set the climate control to the lowest temperature and the blower to the max.
Open the hood of your Hyundai. Locate the low-pressure air conditioner service port and remove the cap.
Locate the air conditioner charging port or service port. The A/C port is behind the engine near the firewall in the Elantra.
If the connector from the A/C recharge kit doesn’t fit on the port, you may be trying to connect to the high-pressure port, which is a different size than the low-pressure port. If you still have trouble locating the A/C charging port on your Hyundai, this video explains it all.
Add refrigerant to your air conditioner system. Once you connect the gauge, take a look at it to read your air conditioner system’s pressure. If the pressure is low, the gauge reading will be in the white zone. If the pressure is normal, the gauge should be in the green or blue area, depending on the A/C kit you are using. You should not read on the HIGH / RED zone except when the car is turned off.
Keep the can UPRIGHT. As you charge the system, shake the can every two or three seconds while charging. Every few seconds, release the trigger to stop the charging process. Take a look at the pressure gauge. (It is normal for the gauge to show overcharging when the engine is turned off.) Don’t overcharge the A/C system. Stop recharging the A/C system once the pressure is within the acceptable range. Measurement should only be taken while the engine is running.
Disconnect the A/C recharge kit. Detach the quick connection from the A/C port. Reinstall the cap. Don’t overtighten the cap. Close the hood and enjoy your AC system.
Remember that a system with a large leak may lose the refrigerant quickly and require mechanic repair before being topped off with refrigerant.
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This procedure is not recommended for A/C systems that are empty. On an empty A/C system, the air must be extracted with a vacuum pump. Topping off the Hyundai A/C system is very easy and can take up to twenty minutes, depending on the system’s capacity.
We hope you find the Hyundai Air Conditioner A/C Recharge Instructions guide helpful. Check these troubleshooting and repair guides for more help on your Hyundai.
Frequently Asked Questions
What type of refrigerant do Hyundai vehicles use?
R134a – Always check the sticker under the hood or the owner’s manual.
Is A/C covered under the Hyundai warranty?
Yes, as long as the vehicle is under the manufacturer’s warranty.
How do I know if my AC needs to be recharged?
The aircon blows hot air. Malfunctioning A/C clutch An unpleasant smell is coming off from the vents. Leaking Refrigerant
Written and fact-checked by:
YOUCANIC Techs
YOUCANIC articles are written by authors who collectively have over 60 years of experience in the automotive field and years of hands-on experience on vehicles. These authors are certified ASE G1 Automotive Maintenance engine professionals (the highest level certification for vehicle maintenance and repair). They hold associate’s and bachelor’s degrees, as well as having gone on to further study to receive a master’s and doctorate degrees. These authors collaborate on research, writing, editing, and fact-checking every article to ensure that it is accurate and up to date and delivers the best counsel and information to YOUCANIC readers.
View all posts Rush*t Hila is an engineer and ASE certified in G1 Automotive Maintenance
For a good charge, the low-pressure gauge should read between 25 and 40 psi (pounds per square inch), and the high pressure gauge should read between 225 and 250 psi.
Refrigerant can leak slowly from your car's air conditioning system over time, but recharging your car's air conditioning system so it once again blows cold air is an easy DIY task and takes just about 15 minutes.
After you finish testing your system, it's best to turn off your system, unless the directions on your charging kit say otherwise. Always follow the directions on your charging kit to ensure that you get the best possible results.
You cannot mix refrigerant types, and putting the wrong refrigerant in your car will cause damage to the air conditioning system! If you're not sure which kind of refrigerant your vehicle takes, DIY A/C charging may not be for you.
Is R134a being phased out? R134a is being phased out globally due to its high global warming potential (GWP). It's been banned for new vehicle AC systems and chillers in the United States, and lower-GWP alternatives are taking its place across many industries.
If you need help performing this, or any AC recharge or service, check out our list of preferred shops in your area that can help. Or, if you'd like to tackle the job yourself, AutoZone has all the tools and refrigerant to service your R-134A or R-12 vehicle.
It doesn't take so long after recharging for the car air conditioner to blow cold air as normal. Car overall systems are different from one to another, so you can not expect an exact period for all. But the typical recooling time of car AC air is from 2 to 2.5 hours.
Freon settles in an air conditioner in a matter of minutes. Though, it depends on the type of air conditioner too. If the air conditioner is portable, it takes about 5-30 minutes for the Freon to settle. This time must be dedicated to the appliance for it to function properly.
(1) It depends on the car. Most cars will hold between 28 and 32 ounces of refrigerant (or about 2-3 12oz cans), however larger vehicles and those with rear A/C will likely hold more. Check your vehicle manual for proper system capacities.
If you think that you have an issue with your A/C system but you are not sure which component is causing the malfunction it is a good idea to hook your compressor up to a pressure gauge. An A/C System that is working properly should have 150 PSI on the high side and 30 PSI on the low side.
If you need refrigerant for your air conditioner, you'll need to contact a professional heating and cooling technician. Under EPA regulations, only a certified professional can recharge your home's HVAC system. You should never try to recharge the A/C yourself, even if you have a home air conditioner recharging kit.
As mentioned earlier, Freon costs about $125 – $150 per pound. Most homeowners will pay in the range of $200 to $400 for a refill, depending on the type and size of their HVAC unit. If you own a larger r22 unit, you may have to spend $600 or more.
Without enough refrigerant it needs, your air conditioner can't absorb the heat in the air. This will result in air coming out of your vents that is not cool enough, or maybe even warm. You may even have less air blowing out of your vents.
If your compressor will not engage, add half a can of freon. If it still will not turn, it is likely broken. Do not add more refrigerant! You will need a mechanic to repair this problem.
Introduction: My name is Kerri Lueilwitz, I am a courageous, gentle, quaint, thankful, outstanding, brave, vast person who loves writing and wants to share my knowledge and understanding with you.
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