Many homeowners come across the basic issue of a musty smell in their AC. The longer you wait on this problem, the more damage your system will incur. Our service providers have pointed out some significant reasons behind such a problem, which are the following:

1. Mold in The Ducts and Filters: Ducts play a pivotal role in distributing cool air across your house. If you don’t clean these ducts and air filters more often, mold or mildew starts growing. As a result, the cool air from the AC system will get mixed up with molds and produce this musty smell, which is why you must clean the ducts on time and even hire a professional to do this job.
2. Frozen Evaporator Coils: The evaporator coils, responsible for transforming warm air into cool air, sometimes get frozen for different reasons. The system fails to provide cool air when it happens, and a musty smell emits with the warm air instead. At this point, you need to change the refrigerant or the air filters. Contact our professional AC replacement service expert in Atascadero to help you.
3. Obstructed AC Drain Line: If your air conditioner’s drain line gets clogged with dirt or for other reasons, your indoor air will not be dehumidified. As a result, a musty smell will cover your house eventually. Such a problem requires expert attention.
4. Improper AC Size: Many homeowners don’t understand how significant the size of the AC is for your home. Our AC installation technicians in Paso Robles say that adequate AC size will determine the indoor atmosphere of your house. If your AC is too big for your home, it will quickly pull in the fresh air and prevent it from being adequately dehumidified.
   On the other hand, if your AC is undersized, it won’t cool off your home and could lead to a musty smell. You should not take this reason lightly. You need to make an informed decision during your AC installation to prevent this problem from happening in the future.
5. Leakage in The Air Ducts: If you don’t service your AC system quite often, the air ducts may develop leaks. These leaks help mold growth due to excessive humidity in your rooms. You might not realize this problem in the initial stage. Yet, as the AC starts producing a musty smell, you might want to inspect the condition of the air ducts.