Mini‑splits (ductless heat pumps/AC) are comfort champs—but their indoor heads can collect dust, biofilm, and moisture. The result? Musty odors, reduced airflow, and higher energy use. Prevent issues with a simple routine and periodic pro service.

Know your components:

• Indoor unit: filter, evaporator coil, blower wheel, drain pan.
• Common trouble: biofilm on the coil/blower, clogged drain causing leaks, and dust‑packed filters that choke airflow.

Easy homeowner routine:

• Monthly in peak season: wash or replace filters; vacuum the intake grille.
• Check the condensate: look for drips, stains, or musty smells; if present, schedule service.
• Clear the outdoor unit: 2–3 feet of free space, no leaves or debris.

When to call a pro:

• Annual deep clean (or after renovations) to safely clean the coil, blower wheel, and drain pan using protective cleaning bags and proper chemistry.
• If you notice strong odors, visible growth, or persistent noise/inefficiency.

Performance tips:

• Run “dry” or “dehumidify” mode periodically to reduce moisture in the head.
• Keep setpoints steady; short cycling increases condensation and dust accumulation.
• Log service dates and photos so you know when the next deep clean is due.