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Why Your Car’s Air Conditioning Isn’t Working and How to Fix It

Car AC not working

There are many advantages to having air conditioning in your car, especially on hot, humid days. However, a vehicle’s AC system is complex and relies on the proper functioning of many different components , hoses and lines. Here are some of the reasons why your car’s AC may not be working and how you can fix it.

Signs your vehicle’s AC stopped working

In most cases, the AC won’t stop working without warning. Here are a few signs that your car’s air conditioning might need attention:

  • It makes strange noises and hissing sounds
  • It blows warm or hot air
  • It cycles on and off frequently
  • It emits strange odours

AC problems and fixes

Most vehicle cooling systems consist of a compressor, a condenser and dryer, an evaporator, expansion valve and hoses. If any of these parts fail, your AC will stop working. Here are the most common problems and their fixes:

  • Leaking refrigerant. Refrigerant can leak anywhere along the multiple components, lines and hoses, but leaks are most commonly found near the connection points. It can be difficult to pinpoint the source of the leak, but once it’s located, the leak can be repaired.
  • Blocked condenser.  The condenser is responsible for cooling the refrigerant. If it’s blocked or clogged, it will be unable to properly cool the refrigerant and cause your unit to blow hot air. This can usually be resolved by physically removing any debris that’s blocking the condenser, or if it is internally plugged, replacing the condenser.
  • Leaking condenser. If the condenser is leaking, the only way to fix it is by replacing it.
  • Faulty fans. Blown fuses and cracks in the cooling fans can also cause your unit to blow hot air. Broken fans need to be replaced.
  • Electrical issues. A qualified mechanic should address electrical issues and blown fuses.
  • Compressor problems. Lack of use can cause problems with a car’s compressor. The compressor is responsible for pressurizing the refrigerant and keeping it circulating. To maintain your compressor, you should keep your AC system turned on full blast for at least 15 minutes once every few weeks, regardless of temperature.

AC maintenance

Some AC issues are relatively easy to fix, while others require a professional diagnosis and repair. It’s important to schedule regular auto tune-ups as proper maintenance can keep your AC functioning properly. During regular maintenance, a qualified mechanic can detect minor issues before they become costly problems.

Auto repair in British Columbia and Alberta

Minit-Tune & Brake Auto Centres offer car air conditioning repair and maintenance services. Our qualified technicians can identify and correct issues with your heating and air conditioning. Visit us at one of our 17 locations or contact us today to book an appointment.


Minit-Tune & Brake Auto Centres Address Common Issues

Here at Minit-Tune & Brake Auto Centres in British Columbia, we’re always pleased to help our customers get the most out of their cars and trucks. To that end, we’ll add a relevant blog topic from time to time to keep you up to date and getting the most out of your vehicle.