Why is My Air Conditioner Not Cooling ? When your air conditioner suddenly stops working, it can be cause for alarm or it can be something as simple as a blown fuse or tripped circuit breaker.

possible reasons behind AC not cooling properly

1.The Filters Are Clogged

Perhaps the most common cause of AC issues is clogged filters. Dirt, pet hair, pollen and dust can clog your filters.

When filters get clogged, they begin to restrict the flow of air through your AC. The result is that the AC doesn’t cool your indoor air effectively. Clogged filters can also interfere with the functioning of your system’s indoor evaporator coil and outdoor condenser unit.

The best way to avoid issues with clogged filters is to clean them regularly and change them when required. We recommend changing them every three months. For those with pets, it may be necessary to change filters more often.

2. The Refrigerant Is Leaking or Low

AC systems use refrigerant, a chemical that transfers heat from the indoor space and moves it outdoors. There are many types of refrigerant, including Puron and the well-known, phased out Freon, that cool the air in your AC system. When the refrigerant level is low, your AC may have problems cooling the air in your home.

There are two possible reasons your AC’s refrigerant level is too low. It could be that the system was undercharged during installation.

More commonly, it could also be that there’s a leak within the system. In such a case, it’s important that you seek professional AC repair right away. A refrigerant leak can cause refrigerant poisoning, although rare, and harm the environment.

3.DIRTY AIR FILTER

Your AC system may include an air filter located in or around the indoor air handler unit. The filter catches dirt, dust and other airborne particles as they enter the air handler unit. It keeps the components inside the system cleaner and operating more efficiently and can help keep the air in your home cleaner as well. A dirty air filter can block airflow and reduce cooling to your home. In more extreme cases it can cause the system to shut down completely.

If your thermostat checks out and you still don’t have cool air, locate your system’s air filter, turn the system off, remove the filter and inspect. If, after you are satisfied that you have a clean air filter and your central air conditioner does not cool your home, you’ll have to dig a little deeper to locate the problem.