Imagine this:
You’re a kid, and your family has been on the road all day. You and your siblings are jammed into the backseat, arguing over the windows and the radio. Finally, after what feels like a million miles, you pull up to your grandma’s house. You race to the porch, the screen door swings open, and you rush inside. You take a deep breath, and it smells exactly like you remember: a mix of old, musty, and whatever’s cooking in the crock pot.
That musty smell might feel nostalgic at Grandma’s—but not in your own home. When it happens in your house, the search begins. Where is it coming from, and how do you get rid of it?
A Dirty Austin HVAC System Is the Most Common Cause of Musty Odors
Musty is a subjective smell. It isn’t fully rotten or mildewy. It’s more like…old.
And it can be tricky to locate. Start with these steps:
- Vacuum your upholstered furniture.
- Clean everything else while you’re at it: walls, under sinks, all carpet, under furniture, ceiling fans—every inch.
- Check the basement for leaks.
- Inspect your pantry for a forgotten potato.
- Look under your teenager’s bed. There’s no telling what’s under there.
- Ensure good air circulation throughout your home.
- Open blinds and curtains. Sunlight helps sanitize naturally.
If the smell still lingers, your HVAC system is likely the source.
What’s in Your Ducts?
After helping hundreds of Austin HVAC customers track down musty odors, these are the most common culprits.
Clogged air filters can cause musty odors
Your furnace filter captures more than dust and pet hair. It traps mold and mildew, too. When filters aren’t replaced regularly, those microbes thrive. A clogged filter also blocks airflow, which lets dust settle inside your ducts.
You can try vacuuming the filter, but if it’s heavily packed, replace it.
Dirty air ducts can cause musty odors
Mold and mildew thrive in dark, moist areas. Add dirt and dust, and your ducts become the perfect home for odors. HVAC professionals can inspect ductwork using a small camera to find trouble spots.
The Environmental Protection Agency recommends a duct cleaning if:
- You see mold inside the ducts or HVAC components.
- You have pests, such as insects or rodents, inside the ducts.
- Your ducts are packed with dust, or dirt blows from the registers.
Clogged drains can cause musty odors
HVAC systems create condensation, which drains away from the unit. If the drain clogs, moisture can seep into ductwork or back into the evaporator pan, speeding up mold growth.
Try clearing the drain with a wet dry vacuum. If that doesn’t fix it, call an Austin HVAC technician.
A dirty evaporator coil can cause musty odors
Moisture plus dirt equals odor. If your evaporator coil is dirty, follow these steps:
- Turn off your HVAC system and remove the access panel.
- Gently vacuum the fins and coils using a soft brush.
- Straighten any bent fins with a screwdriver.
- Spray with a solution of one part bleach and ten parts water (never use full strength bleach) and wipe gently. Coil cleaner from a hardware store also works.
- Remove and clean the evaporator pan.
- Reassemble the unit and turn it back on.
Sick of That Musty Smell? We Can Help
Most homeowners aren’t comfortable working on their HVAC systems, and that’s completely understandable. We can inspect your system, identify the cause of the odor, explain everything clearly, and give you honest pricing for the fix.
You deserve a fresh smelling home. We’re here to help. Give us a call to get started.