Can I wait another season?
Odor and mold worsen with time — earlier cleaning is cheaper than damage or health irritation.
Signs Your Mini Split Needs Cleaning
If you notice any of these, a filter swap alone probably won’t be enough.
Top signs: musty smell, weak airflow, visible mold, water leaks, ice on coil, dust from vents, or higher electric bills with less cooling.
Checklist
- Musty or sour odor when running
- Weak airflow at full fan
- Black or green spots on coil
- Water dripping indoors
- Ice forming on coil
- Dust blowing from unit
- Unit runs constantly
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