A/C Problems Demystified

June 30th, 2016

Believe it or not, the A/C system in your vehicle is fairly simple in principle and design. Like your refrigerator, it operates on a cycle of compression and expansion of a gas, known as refrigerant. The compressor turns the gas into a liquid, and as the gas evaporates it provides cooling. Like your refrigerator, its main components are: 
 
  • Compressor
  • Condenser 
  • Receiver/dryer
  • Thermostatic expansion valve
  • Evaporator
  • Refrigerant
  • Blower 
The good news is most automotive A/C systems have become very robust and reliable compared to cars from a generation ago. Most of the time, poor performance is due to low refrigerant levels due to leaks in the system around the O-rings, gaskets, seals, and lines (which can all dry out and shrink). Low refrigerant can mean other problems though. Since refrigerant contains oil which lubricates the compressor, low levels of refrigerant can mean an overheated compressor sending tiny shards of metal through the rest of the system to wreak havoc. 
 
These are sure signs of problems: 
 
  • A/C that's barely cooler than the air outside
  • A/C only blows cold while car is moving, not at idle 
  • Metallic clicking under the hood, as the compressor's magnetic clutch cycles the compressor on and off
  • Musty, "dirty socks" smell from air vents
  • Volume of air from vents is never enough
Obviously, all these components can potentially fail...but often they fail due to low refrigerant levels, and even a late model vehicle can lose five to ten percent of its refrigerant over a year's time. Why take chances? Recharging the system with refrigerant is easy and inexpensive, and should be part of your A/C system's (and your car's) routine maintenance! 
  Posted in: Auto Repair 101
JD’s Auto & Trailer Repair
43W770 IL Route 64
Lily Lake, IL 60151
630-365-9701

Stop By and See Us Today

JD’s Auto & Trailer Repair understands the importance of quality service and strives to offer each of our customers quality trailers, repairs, and trailer services. We take pride in each and every trailer sale, service and repair that we do. JD's Auto & Trailer Repair  takes pride in doing their job correctly. We don't oversell unnecessary repairs and we take pride in informing our customers of the repairs that are needed,  then proceeding with the repair to make the trailer reliable and safe.  Our most important goal is to provide a service where trailer safety is the top priority. We carry all the top brands such as Reese, Hidden Hitch, Curt, Fulton, Draw Tite, Bulldog and Dexter. Stop by and let one of our experts help you with all your trailer needs today!