Why Is My Car’s Air Conditioning Blowing Out Hot Air?

May 19, 2020 10:26 pm Published by Leave your thoughts

With summer fast approaching, it’s important to make sure your car’s air conditioning is in good operational condition. While you can always roll down the windows if your air conditioning goes out, eventually you will get to a point where it’s simply too hot to be behind the wheel comfortably, even if you have the windows open.

Some of the most common problems associated with air conditioning in cars are a lack of air coming from the vents, or hot air blowing from your car’s AC in Chino, CA. Here’s what you should know about these issues.

Addressing hot air from car AC

If you have air coming from your vents, but it is only warm air, this is most likely to be caused by a refrigerant leak. The components in your vehicle’s air conditioner rely on refrigerant to cool the air, and if there isn’t enough refrigerant, then the rest of the components in the system will not function properly.

Leaks are most commonly caused by holes in hoses, connections, the condenser or the compressor, or could be caused by damage to the evaporator. Refrigerant leaks can be hard to identify or pinpoint, because the refrigerant will evaporate, unlike oil and other types of vehicle fluids. The only reliable way of finding a leak is to take your vehicle in to a maintenance professional, who can add a fluorescent tracer dye with additional refrigerant. The technician will then run the system and, using a black light, figure out where the leak is located before beginning repairs.

If the problem is that you have no air at all coming out of your vents, there could be several issues at play. Here are a few of the most common problems:

  • Blown fuses or bad relays: This results in no power flowing to the blower motor. This would prevent air from blowing through the vents.
  • Damage to the blower motor or resistor: The motor pushes the air through the vents, and if it’s damaged, then you may not have any air pressure. In addition, resistors work with the motor to control the volume of air being blown through the vents.
  • Damage to belts and hoses: The hoses and belts located in the air conditioning system play a crucial role in its operation, so if they’re detached, blocked, damaged or leaking, this could result in improper airflow through the vents.
  • Blockages: If the air intake is blocked off due to a clogged filter or debris in this system, this could result in the vents not blowing any air into the cabin.

Given the variety of potential causes behind these problems, you’ll need to work with a professional maintenance technician to address the issue. For more information about the steps you can take if your car air conditioning is blowing hot air in Chino, CA, we encourage you to reach out to an experienced mechanic at Gabriel’s Automotive & Towing with any questions. We’d be glad to offer suggestions on the best way to repair your vehicle’s air conditioning.

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