Mooresville Auto Repair

Why Is My Car A/C Blowing Hot Air?

There's nothing worse than sitting behind the wheel on a hot summer day and being blasted with hot air through your vents. While there are many factors at play, AC blowing hot air indicates a major problem. Below are some of the things that can be causing your air conditioning to blow warm air:

Electrical Problems

If a single wire connected to your auto A/C is frayed, burnt, or damaged, it can signal your car AC to hot air instead. Something simple like a blown fuse can even cause your A/C to shut off completely, so it's important to have a diagnostic test here at STR Automotive.

Lack of Refrigerant/Freon

Refrigerant is a liquid to gas matter that is at the center of your car's A/C system. Without refrigerant, your air would not be cool. Over time, leaks of freon are possible. You can count on the A/C experts at STR automotive to catch any leaks and refill your vehicle with refrigerant.

Broken Condenser

The condenser tends to get blocked by dirt or debris, and you could get warm air as a result. The condenser plays a major role in working with the freon to keep you cool.

Faulty Compressor

The compressor is the component that is constantly moving in order to keep refrigerant moving throughout your car. If the compressor is not working properly, cool air will never be able to reach the passenger cabin. Sometimes, in the winter when your AC is not in use, the compressor will fail to kickstart in the spring and summer.

Filthy Filter

A dirty cabin air filter can prevent sufficient airflow, making the air feel less cool. It is important for you to check the condition of the air filter and replace it if needed. Besides insufficient airflow, a filthy filter is full of dust and germs that can harm you when you breathe in.

Stuck Blend Door 

The blend door prevents the warm air on the outside from getting into your car. If your blend door is stuck, the cool air generated will never get through.


If your car air conditioning isn’t feeling cold enough, feel free to bring your vehicle to the experts at STR Automotive. We’ll carefully inspect and diagnose your A/C problem and have it fixed promptly. 

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