image description

Why Is My AC Compressor Not Working But My Fan Is Blowing?

June 13th, 2023 by eshoop

Air conditioner being repaired by an HVAC technician.

If your A/C’s compressor is not working while the fan is still blowing, you know how frustrating it can be. This scenario can leave you sweltering in the heat, wondering what went wrong and how to fix it. In this article, we explain the reasons why your AC compressor might not be working even though the fan is still running. By knowing these causes, you can take steps to address the issue and keep your home cool and comfortable.

1. Faulty Capacitor

One common reason for an AC compressor not working but the fan still blowing is a faulty capacitor. The capacitor is a small electrical part that helps start the compressor and keep it running. Over time, capacitors can wear out or become damaged. This leads to the compressor’s inability to start or function as it should. If the capacitor is the issue, you may need to replace it to get your AC compressor up and running again.

2. Refrigerant Leak

Another possible cause of a non-functioning AC compressor is a refrigerant leak. Refrigerant absorbs heat from the air inside your home and releases it outside. This substance allows your air conditioner to cool your space. If there is a leak in your system, the refrigerant level may drop too low for the compressor to operate. In this case, you’ll need to have a professional HVAC technician locate the leak. They can repair it and recharge your system with the correct amount of refrigerant.

3. Electrical Issues

Electrical problems can also lead to a non-functioning AC compressor. These issues can include damaged wiring, a tripped circuit breaker, or a blown fuse. If you suspect an electrical issue is the cause, contact a qualified technician . They can diagnose and repair the problem. Attempting to fix electrical issues on your own can be dangerous. It may also void your air conditioner’s warranty.

4. Overheating

Your AC compressor may stop working if it becomes overheated. Overheating can occur for several reasons. A dirty condenser coil, a blocked air filter, or a lack of refrigerant are the most common reasons. When the compressor overheats, it will shut down to protect itself from damage. If you think your compressor is overheating, turn off your air conditioner. Let it cool down before attempting to restart it. If the issue persists, contact a professional HVAC technician for help.

5. Compressor Failure

In some cases, the AC compressor may fail altogether. Compressor failure can be due to many factors like age, wear and tear, or defects. If your compressor has failed, you will need to replace it. Depending on the age of your system, it may be better to replace the entire unit rather than only the compressor.


When your AC compressor isn’t working but the fan is still blowing, it can be frustrating. By knowing the causes of this issue, you can take steps to address the issue and restore your home’s comfort. Remember to talk with an HVAC technician when dealing with air conditioner issues. They have the knowledge and expertise necessary to diagnose and repair issues. If you need help with your AC compressor, contact Thornton Heating Services today.