Four Causes of Vehicle AC Failure

4 Causes of Vehicle Air Conditioning Failure

In case you haven't noticed, Summer is officially here. Texas natives and transplants know the importance of a reliable air conditioner for their vehicle! Unfortunately, when vehicle air conditioner’s decide to quit on us, it’s generally during the most inopportune times. 

We’re frequently asked, “Why is my car air conditioner blowing hot air or not working?” Most vehicle air conditioning issues result from four of the following failures:

1. Freon

The first thing to check is always the freon because you could be low. If you’re low on freon, that can cause your air conditioner to not blow cool air. Get your air conditioner professionally inspected to ensure you’re getting the proper levels of freon. When you get your vehicle checked out we can also inspect for leaks, which will likely result in further problems in the future.


2. A/C Fan

Your fan could be broken and not blowing. When that happens your system is still blowing cold air, but you’re going to feel like it’s not working right.


3. The Register

Many times people get in their car and hear a clicking sound, “click click click click.” This very common noise often means that there may be a problem with your register, which means your temperature control blend door may not be moving all the way. When this happens, you can get half cold air, half heat. You may also have a problem with the blend doors not opening at the registers, which will keep the air from moving through your system. You could also have a problem with the registers from top to bottom or from your defrost vent to your floorboard.


4. Automatic or Manual Control System

If your air conditioning system is automatic, that can be the source of a problem. However, manual systems run off of vacuum, and if you have a large vacuum leak then your AC system will not function optimally.


To Prevent Your Vehicle Air Conditioner From Failing:

Have your vehicle inspected by a mechanic you trust (may we recommend. . . Rusty’s Garage?). Our technician will evac it, measure out the system the right way, and add the proper amount of Freon. We recommend that you do not try to do this yourself – we don’t want our customers to ruin their air conditioning system that way, which would end up costing more money in the long run! Call Rusty’s Garage to schedule your Vehicle A/C inspection (832) 495-8270. 


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