Why your mini-split AC smells musty in NYC: causes by smell type (musty, sour, sewage, sweet, vinegar, fishy), DIY fixes you can try now, and when to stop and call a professional.

Real 2026 NYC pricing for mini-split AC cleaning: $190–$375 per indoor unit. What's included, why NYC costs more, and how often to schedule.

Wash filters every 4–6 weeks; professional deep cleaning every 8–12 months in NYC. Complete maintenance schedule, signs to watch for, and DIY vs professional guidelines.