Arizona is dry, so mold may seem like a problem for other places. But your air conditioner creates moisture every time it cools. That moisture collects on the coil and drains away. When it does not drain properly, or condensation forms in the ductwork, mold can grow.
Where mold hides in an HVAC system
- On the evaporator coil and in the drain pan
- In ductwork near the air handler
- Around supply vents where cold air meets warm, humid air
- Near any spot where a leak has soaked the ducts
Warning signs
- A musty smell when the AC runs
- Dark spots around vents or registers
- Water around the indoor unit
- Visible growth inside the air handler
What to do next
- Do not scrub or disturb it heavily. That can spread spores.
- Find the moisture source. A clogged drain line or a leak is a common cause.
- Call a professional. We can clean and treat affected HVAC and duct surfaces with our mold treatment service.
If mold reaches walls, ceilings or other building materials, that is a job for a licensed mold remediation company. We will tell you honestly if what we see goes beyond the HVAC system.
Helping keep it from coming back
- Keep the condensate drain line clear.
- Replace air filters on schedule.
- Clean the coil regularly.
- Consider a UV light to help limit growth on the coil.
Ready for a professional clean? Book mold treatment and our CSA will call to confirm within 2 business hours.