If you find your car's air conditioning system is not cooling as well as it should, there are several things you can do to improve its performance.

Clean or replace the air filter.

To check the air filter, park your car in a well-ventilated area and turn off the engine. Open your hood and locate the air filter housing. Remove it by unscrewing (counterclockwise) its holding screws with a screwdriver or wrench. Take out the old filter and inspect it for dirt and debris, which may indicate that it’s time to replace it.
To replace an old dirty filter, just do what you would normally do when you replace any part - remove all fasteners surrounding each end before pulling out both sides of the old one from inside its enclosure. Then put in a new replacement unit that matches exactly with respect to size (diameter) and length as well as make sure it has adequate sealing rings around all four corners before cutting off its plastic packaging so as not to damage anything else within reach while doing so! Finally reattach everything carefully back into place before starting up again with this step

Use a sunshade.

You can buy a sunshade at any auto parts store and use it to keep the car cool in the summer. The sunshades don't lie flat on your windows, but they're easy to install and remove.

Use a windshield shade.

A windshield shade is another option for keeping your car cool when it's parked or driving around town! You'll find them in the same section as sunscreen at stores like Walgreens or CVS, so look for one that fits well with how you park your car (e.g., if you park parallel but have very short cars, consider getting an RV-size windshield shade).

Park in the shade, or use a windshield visor.

• Park in the shade, or use a windshield visor.
• Parking in the shade will help keep the car cool if you have to leave it sitting for an extended period of time. A visor will also make sure that sunlight doesn’t shine directly into your eyes and get them watering, which can be distracting when driving. Visors are especially useful if you drive a convertible during hot weather, because they can keep direct sun off of both your face and the top of your head!
If possible, blow hot air out of the cabin before using the A/C.
The best way to keep your car cool is by turning on your heater before you turn on the A/C in order to remove some of the heat from inside your vehicle. This will make it easier for you to cool down while driving and reduce costs as well. If you do not have an electric fan or ventilation system in your car, then this step may not be necessary but will definitely help if done correctly!
If possible, set up a small fan in front of where passengers sit when they get into their seats so they can feel cooler while inside first before putting on any type of cooling mechanism like air conditioner during summer months when temperatures outside reach high levels (above 90 degrees Fahrenheit) which makes outdoor activities uncomfortable at times because sunburns occur frequently especially among those who don't use sunscreen regularly enough!
Read More: https://autoremedy365.com/how-to-make-a-c-colder-in-car/