You have to take care of your AC system and listen to the different sounds that are coming through the outdoor condenser or the air handler that is inside. If you happen to hear any strange through the wall air conditioner noise, you may be able to diagnose the related problem. You can tell whether or not there is a problem just by listening to these systems.
Take some time to listen to the sounds that your air handler is making which is located in your attic, garage or closet. When the thermostat is turned on, you should be able to hear air coming out of the supply vents and you should also feel this air coming out.
If you do not hear the sound of air passing through the supply vents, put your hand on the access panel for the air handler to see whether you can feel the blower wheel vibrating and if there is a loud humming sound or an abnormal noise of any type or even a burnt smell, your motor is probably bad. You will have to have the electrical parts of the air handler repaired or replaced by a licensed technician.
There is another component of your AC unit called the condenser and this will be situated at the side or rear of your property. Go outside to the condenser and listen to the fan blade moving and you should hear a steady blowing sound. There should not be a lot of vibration coming from the condenser. If this unit is vibrating a lot, your fan blade may not be balanced properly. When this happens, the condenser can burn out or a leak can develop if the problem is not resolved.
Thus, if you find that the condenser is vibrating quite a bit, you should contact a technician to inspect the problem right away rather than waiting until the system stops functioning entirely.
The overall goal of this article is to increase awareness of how important it is to listen to your AC system so that you can identify and resolve problems before major cooling issues develop as this will help you to avoid the often high costs of having to pay for additional repairs when small issues are given the opportunity to spiral out of control.