Is Your Vehicle's Air Conditioning Not Working? How to Troubleshoot It

Do you have a vehicle that is blowing hot air when the air conditioner is running? If so, it will help to do the following things to troubleshoot the problem.

Check the Temperature

The first thing you want to do is see what temperature the air is as it comes out of the vents. You can do this by turning on the air conditioning after the vehicle has been running for a while, and then put a thermometer in one of the vents. This will give you a good baseline for what temperature the air is at the time, and can confirm if it is blowing too hot.

Check the Compressor Clutch

You'll then want to look under the hood to make sure that the compressor clutch is engaging. If the air conditioner is turned on there should be power running to the compressor clutch and you'll see the electromagnetic plate engage. If the part is not doing that, then you know that there is a problem with the compressor clutch. If the clutch is engaging, visually inspect other areas for potential problems. You want to make sure that the electrical circuit going to the clutch coil is in good condition. If you see frayed wires, that may be the problem.

Check the Evaporator

Your local auto parts store will sell the gauge set needed to inspect your air conditioner. When using them, you'll want to prop up your hood and suspend it upright. Take note of the low side and high side of the gauge set, with the blue representing the low side and the red representing the high side. You plug these into the low and high ports of the evaporator and take some readings.

With the vehicle running, you will get a reading on the gauge set that will give you a good indication of what could be wrong with the vehicle. If everything is working fine, then the low pressure side will be between 18–28 PSI and the high side between 213–250 PSI.  If the low and high sides are higher than this (with the low pressure side between 36–50 PSI and the high pressure side between 284–356 PSI), then you likely have air in the system and you need to put in more refrigerant. Consider taking your vehicle in to an auto shop to have the system recharged.

For more help diagnosing auto issues, contact broken AC repair services. 

About Me

Auto Repair: It's a Wide, Wide World!

Automobile ownership or usage is something that nearly everyone has in common. Of course, if you own or drive a car, you have to be prepared to properly maintain and repair it in order to ensure that the vehicle will be dependable. That's what this site is all about. Whether you could use some tips for maintaining your car, a troubleshooting guide to determine what each squeak, clunk, and vibration might mean, or help in finding the right repair professional, you are likely to find it here. We will be posting new information, tips, blogs, and helpful video links frequently, so be sure to stop by often to stay informed in the wide, but wonderful world of auto repair.



Latest Posts

5 May 2023
Auto repairs can be costly, and it's essential to find a repair shop that offers reasonable prices without sacrificing quality service. With so many a

6 April 2023
The transmission plays a crucial role in a vehicle's overall performance because it ensures smooth gear shifts and optimal power distribution. When tr

7 March 2023
Your car's exhaust system is crucial since it prevents toxic emissions from entering your vehicle, keeping you and your passengers safe. It also keeps