Q: I noticed a “musty” smell when I tested my AC today; is that normal for May?
Homeowners often notice strange odors the first time they turn on their systems for the season, but that doesn’t mean it should be ignored. If you’re already noticing unpleasant smells, it may be time to schedule professional maintenance or even AC repair in Murrieta, CA before summer temperatures arrive in full force.
Why Your AC Smells Musty
A musty smell coming from your air conditioner is often a sign of mold, mildew, or bacterial growth somewhere inside the system. During the cooler months, moisture can linger inside components like the evaporator coil, condensate drain line, or condensate tray. When the system sits unused for weeks or months, that damp environment creates ideal conditions for microbial growth.
Once you turn the AC back on in May, the air blowing across those contaminated surfaces can carry unpleasant odors throughout your home. In some cases, homeowners describe the smell as damp laundry, dirty socks, or stale water. While a brief dusty smell at the beginning of the season can sometimes be normal, persistent musty odors are not something to ignore.
Why You Should Act Before June
As temperatures rise heading into June, your AC system will begin running much more frequently. If mold or bacteria are already present inside the system, the problem can quickly worsen as warm weather and heavy use create even more moisture.
Beyond the smell itself, microbial growth inside your HVAC system can negatively impact indoor air quality and overall comfort. Some homeowners may notice increased allergy symptoms, headaches, or irritation when contaminated air circulates throughout the home. Ignoring the issue can also allow buildup to spread deeper into the system, making it harder and more expensive to resolve later.
What Professional AC Maintenance Includes
The best way to eliminate musty odors is with professional AC maintenance. Our expert team thoroughly cleans critical components that commonly trap moisture and debris during the off-season. This includes cleaning the condensate tray and drain line, which often hold standing water left over from last year. Mold, algae, and bacteria can easily grow in these damp areas if they are not properly cleaned and treated.
We also inspect the evaporator coil, air filter, blower components, and other parts of the system to ensure everything is clean and operating correctly. Regular maintenance helps improve airflow, energy efficiency, cooling performance, and indoor air quality while reducing the risk of future breakdowns.
When the Smell Keeps Coming Back
If you already had maintenance performed recently but the odor has returned quickly, there may be an underlying issue with the condensate drain system. A clogged or damaged drain line can prevent moisture from draining properly, leading to repeated buildup and standing water inside the unit.
Left unresolved, this excess moisture can eventually lead to leaks, water damage, and costly repairs. That’s why it’s important to contact our team promptly if you continue noticing musty odors, excessive humidity, or signs of water around your indoor unit.
Don’t wait for the June heat spike to put extra strain on your system. Schedule professional AC maintenance or repair now so your home stays cool, clean, and comfortable all summer long.
Contact RKM Heating and Air Conditioning today to schedule an appointment with us for AC repair in Murrieta, CA. Done Right, Priced Right.