Even if summer hasn't arrived yet where you are, it will be coming soon and coming hot. That's ok, you've got air conditioning in your Hyundai, helping keep your climate controlled and your stress hidden. If you're worried about your A/C, though, don't wait until it leaves you sweating on a miserable August day. Get your Hyundai's air conditioning system running its best right now, before it gets overloaded and you're stuck on the hottest days. We're here to help you make your Hyundai's air conditioning system colder. Even if it's running fine now, some of these tips can help you make sure that it stays that way through the summer season.

1. Air Temperature Probe
Font Cable Electric blue Metal Carmine

The very first thing you'll need when it comes to making your Hyundai's air conditioning run cooler is a temperature probe.

Analogue or digital, the important parts are that it needs to be able to measure temperature to less than 32 degrees and it needs to have a probe that you can insert into your A/C vent. This lets you test your air to find out how warm it is. Then you can quickly find out if there is a problem. Or, better yet, if you've fixed the problem.


2. Cabin Air Filter
Rectangle Automotive design Font Electric blue Gadget

Your Hyundai's cabin air filter is great at keeping dust, pollen, and even bugs from blowing through into your face when you use your car's HVAC system. But these filters get clogged over time, and that restricts airflow. If your cabin filter is stopping the air from getting through it, then it makes your A/C system work harder to do less. That can lead to compressor failure, lower efficiency, and to a serious case of swamp butt in your hot vehicle.

You can change the filter yourself, though. It's usually quick and easy, hidden behind the glovebox. Remove the glove box and you'll probably see the filter. If not, check your owner's manual for instructions. There are a few options when it comes to a new filter, including upgrading the filtration (with a HEPA filter) or adding odor removal with an activated charcoal or carbon layer.


3. Air Conditioning Refrigerant
Bottle Liquid Drinkware Drink Beer

It's the refrigerant that does the heavy lifting in your AC system. A liquid after traveling through the compressor, it turns into a gas in the evaporator and makes your air cool. If your refrigerant - often called Freon because that's a vintage brand name - leaks out, your A/C can't work anymore. You can top it up yourself (after you fix the leak, that is) with the right replacement. Cars made before 1994 use a refrigerant called R12, cars made after use R134a, and some of the latest use R1234yf. There should be a sticker under your hood that tells you which you need, and how much the system holds. Because A/C refrigerant is highly harmful to the ozone layer, many DIY kits use propane or a similar hydrocarbon. Don't worry, these work fine as replacements.


4. Air Conditioning Refrigerant Recovery Unit
Rectangle Water Font Electric blue Bag
Refrigerant is expensive and hazardous. Not just for the planet, but it can give you serious frostbite on your skin in an instant. So if you're going to open the system, like to replace a compressor, you should recover it for re-use. That's what a refrigerant recovery unit does, saving you money and saving the ozone by letting you recycle the fluid.


5. Air Conditioning Diagnostic Manifold Gauges/Hoses
Automotive lighting Line Gas Circle Engineering

If you're diagnosing your A/C, a manifold and gauges are the most important tool you'll need. Your A/C system has high and low-pressure sides. High pressure for liquid refrigerant, low pressure for the gas. And both need to be in-range for the system to work. A good manifold with gauges attaches to the high and low-pressure ports in your system and lets you know in a moment if the system has fluid, and if the system can hold enough pressure to function properly. The manifold also lets you monitor pressures as the compressor cycles on and off, and lets you add more refrigerant to the system once it's been fixed.


6. Air Conditioning Compressor/Clutch
Automotive tire Cylinder Auto part Automotive design Rim

There are only two moving parts in your Hyundai's air conditioning system: the HVAC fan under the dash and the compressor that is attached to the engine. So if a part fails, and it isn't a leak, it's probably the compressor or the compressor clutch. The clutch engages and disengages from the drive belt, letting the compressor spin or sit idle.

A compressor normally fails with a bang. A lack of lubrication or too much wear stops it from spinning and it can shatter the case. Low pressure can also make it work too hard, leading to an early failure. It's not a complicated repair, but you will need to drain and refill the system. If you don't have the tools listed above, then you can have a shop empty and fill the system but replace the compressor at home yourself.

The clutch is more likely to fail, and it will either stick on or stick off. One gives you A/C even when you don't want it, the other means no cool air at all. Either way, the clutch needs replacing. Fortunately, this is one of the easiest A/C repairs. You can remove it without draining the system.


7. Air Conditioning Clutch Removal Tool Kit
Blue Building sets Font Engineering Electric blue

You just need an A/C clutch removal tool. This tool kit comes with a puller that can remove the clutch and its pully from the compressor housing. It's ideal in the tight space of your engine bay to remove this part.


Air conditioning repair can be intimidating, but it's actually a simple system. If it's not working, listen for a click under the hood. If you hear one, you're probably low on refrigerant. Find and fix the leak - usually a loose fitting or an old O-ring - refill the system, and enjoy the cool air. If you don't hear a click, then it is likely a fuse or relay that needs replacing. Lastly, if you hear a click, but can see that the compressor isn't spinning, it's time to focus on the compressor and its clutch pully.

Now get out there and enjoy that cool A/C in your Hyundai.

We are committed to finding, researching, and recommending the best products. We earn commissions from purchases you make using the retail links in our product reviews. Learn more about how this works.