A Guide To Troubleshooting Your Car AC

It’s a hot summer day and you are running errands but unfortunately, your car AC isn’t working properly. Or worst, it’s not working! Sounds very miserable, isn’t it? Driving your vehicle with a non-functioning AC can cause a lot of trouble. Performing some troubleshooting will help figure out the reason so you can choose the right repair solution.

6 Most Common Signs to Look for

In order to begin with your DIY troubleshooting project, turn on the AC while car engine is on.  Properly running car engine is the first requirement for a perfectly working AC. If your car has ‘Max AC’ setting option, choose it or else you can set the fan speed to the maximum.  Next, perform the following checks.

  • Hearing any unusual noses? If your car AC is making some strange noises, there can be a trouble with the compressor.
  • Put your palm against the AC vents and feel if the air is cold or warm. The AC may start with cold air but then start blowing warm air after a while. Note if the air is warmer or colder than usual.
  • Change the AC air pressure to high and low to see if it makes changes in the airflow accordingly.
  • If there is some odour coming from the AC vents, the cooling system may have a leakage problem. You may need to replace the air filter inside.
  • A blown out fuse can also the reason behind a non-working cooling unit. You can check a manufacturer given user manual to check the fuse location or take your car to a local garage.

Troubleshooting For Airflow Related Problems

Troubleshooting For Airflow Related Problems

Image Credit : Wikimedia

  • Use vent selector to check if all vents are building equal air pressure when selected. If you don’t feel airflow coming out of some selected vents, your car AC is likely to have a blend door problem. Blend doors are a very important component of your vehicle’s air conditioning unit; they allow or block the air flow as you change the temperature of the AC.
  • In some cases, air filter in the cooling unit gets choked up due to the accumulation of dust and debris. A clogged air filter can hinder air flow and you may witness a decrease in the air pressure, while the AC is running. In such scenario, replacing the filter can fix the problem in quite an affordable manner!
  • If you see air blows on high setting only, not on a lower setting, it is likely that your blower motor needs to be checked. A foul smell or a unusual noise is common sign of a non-working blower motor.

Troubleshooting For Air Temperature Related Problems

  • Check the AC condenser area. Make sure there is no leaves or dust blocking it.
  • Coolant leak is another most common reason for AC air temperature problems. If the refrigerant level in the coolant system is low despite the fact you haven’t used the AC in last 2-3 months or for several days, it indicates the system is likely to have a coolant leak. To confirm the reason and fix the problem, visit a garage nearby that provide quality car air con services.
  • If your car AC blows cool air when you turn it on but after awhile stop blowing cool air, the system may be a victim of freezing. Excessive moisture in the air can freeze the components. You can use a vacuum pump to thaw frozen components. Still if the problem continues, it is wise to get it inspected by a professional mechanic.

Being aware of some common signs of a non-working AC will help you fix the problem in the most affordable way. Don’t overlook any of these signs of an inefficient cooling system else it can lead to a large repair bill.