It’s the middle of summer, and you’ve been driving your truck all day with the air conditioning on. You get out of the truck at the end of the day and notice that your air conditioning stopped working earlier, but you didn’t have time to take care of it then. Now you find yourself sweating in front of your truck after being stuck in traffic all day, with no AC. Don’t worry — this article will help you diagnose and fix your truck’s AC so that you can cool off as soon as possible!
1) Check The Blower Motor
If your truck is not blowing any air from vents, you might have a problem with your blower motor. First you should check and make sure all settings are correct. If everything checks out then you may need to go deeper. If you feel comfortable with checking for power then you can proceed. You will need to gain access to the motor. What the system on you will check for power and ground to the motor. If you have power and ground to the motor then the motor is bad. You May attempt to correct the problem or bring it to a professional.
2) Check The Blower Motor Resistor
Another common reason that your truck’s air conditioner is not blowing any air from the vents, you may have a faulty blower motor resistor. First check that the system is turned on. If the system is on then you will need to look further. Again if you are comfortable with checking for power then you will need access to the resistor. Check for power and ground to the motor, if you are missing power or ground then the problem could be the resistor. Checking the resistor is probably a better job for a professional.
3) Check The Compressor
If your truck’s air conditioning isn’t blowing cold air, then you could have a problem with your AC compressor. First turn on the system and check for cold air. Now you would need to go under the hood and check the compressor. If you are able to check for power then that is where you can start. Check for power to the trigger wire (should be the only wire running to the compressor). If you have power but the compressor is not engaging then you have a bad compressor. Now if you check for power and have no power then you may have other problems. I would recommend having your system serviced by a professional
4) Check The Lines And Condenser for Damage/Leaks
You may have damaged or leaking AC lines. Check all lines for any kind of build up of dirt and oil. Check all connections for any signs of oil. Check condenser for any kind of damage or bent fens. You also want to make sure there is no debris on the condenser. Make sure you clean the condenser as needed. Good air flow across the condenser is vital to the performance of your truck’s AC. If you find any leaks or damage then your system may be low on freon. I would recommend a professional to service your AC system.
5) System Contaminants
Your system is ment of have 99% pure freon. If you have gotten any contaminants in your system then it may not perform at 100%. You may have dirt, oil, or maybe air from a leak causing problems with your system. The system may have gotten dirt or other debris in it when it was last serviced. If you have no cold air or low performance then have your AC system checked by a professional
A broken air conditioner is pretty inconvenient. If you drive a truck, you may be more worried about how it’s going to affect your livelihood, and whether or not you’ll be able to stay cool in your cabin as you haul loads of cargo. There are lots of factors that could have gone into a malfunctioning truck AC, so take time and troubleshoot things slowly. You’ll likely be able to get things up and running without spending much money at all if you start with some basic checklists and work through them systematically. And remember: always keep your cabin cool by using fans in non-AC equipped trucks! Use these steps to troubleshoot on a case-by-case basis you may be able to determine what went wrong.