Our home air conditioning systems keep us cool and comfortable during the hottest of days. However, a pervasive musty smell coming from your home's air conditioning system can quickly ruin an otherwise relaxing day spent at home. Worse yet, a stale or musty smell coming from your air conditioning system could be a sign of HVAC problems. Below, the experienced AC technicians with Spoor's Heating & Air Conditioning outline some of the most common reasons why your air conditioner smells musty. Spoor's Heating & Air Conditioning is an HVAC company in Auburn, California, offering fast and friendly HVAC services. Contact our AC company today to schedule AC services!


Clogged Filter

Air filters play an important role in every HVAC, as they're responsible for removing dust, pet dander, pollen, and other harmful particles from the air as it passes through your system. Over time, your HVAC's air filter will become dirty and clogged by all of the debris it filters out of the air. When a clogged air filter is exposed to moisture it can cause mildew growth, which may result in a musty smell that spreads throughout your home via your HVAC system. To remedy a clogged air filter, all you need to do is replace it with a new one. Ideally, you should change your air filter at least every 90 days to prevent clogging and preserve indoor air quality.

Dirty Evaporator Coil

If you notice weak airflow coming from your vents in addition to a musty odor, then the problem may be a dirty evaporator coil. An air conditioner's evaporator coil is responsible for absorbing heat from the air inside a home. When this coil becomes dirty, it can become a breeding ground for mold. If you have a dirty, moldy evaporator coil it may cause a moldy smell to spread throughout your home. Avoid the problem of dirty evaporator coils by scheduling routine AC maintenance! Spoor's Heating & Air Conditioning offers an HVAC maintenance program designed to keep your HVAC system running smoothly and efficiently.

Full Drain Pan

Also known as a condensate drain pan or an AC drip pan, your air conditioner's drain pan is responsible for collecting any moisture produced by your HVAC's air cooling process. When an air conditioner's drain pan is full for too long it can lead to mold and mildew growth. Prevent musty smells from a full drain pan with regular HVAC maintenance services.

Mold Or Mildew In The Vents

High humidity or drainage leaks could cause excess moisture to build up in your air ducts and vents. When enough moisture accumulates in your air ducts or vents, it can cause mold to grow. If there's mold or mildew in your vents, your air conditioning system will spread a moldy, musty smell throughout your home anytime the air is blowing. Worse yet, mold exposure can cause respiratory problems, so it's important to contact an experienced HVAC technician if you suspect there's mold in your vents.