An air conditioning system that is not blowing cold air is not providing the desired cooling effect. This can be due to a variety of factors, including a dirty filter, a refrigerant leak, or a problem with the compressor. If the problem is not corrected, it can lead to increased energy costs and an uncomfortable environment.  

There are a few things that you can do to help keep your air conditioning system running properly and blowing cold air. But first, you need to be aware of the reasons why it isn’t operating properly. In this guide, we’ll go over some of the possible causes of your air conditioning system not blowing cold air.

1) Dirty Air Filter  

If you are experiencing uneven cooling in your home, it is most likely due to blocked or dirty air filters. Blocked filters will cause your unit to cool unevenly, allowing some rooms to be too cold while others seem to be not receiving any cold air at all. Blocked filters can also trap pockets of cold air in and around your air conditioner coils, which can cause icing issues that will eventually lead to water damage from the ice.

2) Cooling Switch Problems

If your air conditioner is not blowing cold air, it is also possible that the cooling switch is not turned on. One switch is usually located near the compressor while the other is on your thermostat. If these switches are not turned on, your air conditioner will not blow cold air.

Like any other device in your home, it could fail at any moment. If your thermostat isn’t working properly, a professional technician can help diagnose the problem and may be able to fix it.

3) Dirty Condensing Coils

The condensing coils on your air conditioner may be dirty if your air conditioner is not blowing cold air. These coils are located on the condensing unit and are responsible for cooling the air. If they are dirty, your air conditioner will not be able to cool the air properly.

You can clean the coils yourself. However, you will need to be careful as they are very sharp and they can be bent out of shape very easily. If you are not comfortable cleaning them yourself, you can call a professional to do it for you.

4) Frozen Coils

If your air conditioner is not blowing cold air, the coils may be frozen. This is a common problem that maybe is a sign of a dirty filter or something larger. The best way to fix this problem is to turn your air conditioner off, make sure your filter is clean and let the air conditioner thaw out. Once the coils have thawed, turn your air conditioner back on and it should start blowing cold air. If it doesn’t, this would be a good time to call the professionals to see what is happening with your air conditioner.


If you are experiencing problems with your air conditioner, the best thing to do is to call a professional. They will be able to diagnose the problem and fix it for you.

4 Seasons Home Comfort can resolve any issues you might have with your air conditioner. We offer air condition repair in Lethbridge for any of your pressing concerns. Get in touch with us today to learn more.