Quick answer
Mini-split repair covers wall-mounted, ceiling cassette and ducted ductless units and their inverter condensers. The most common Miami problems are clogged condensate drains dripping from the indoor head, dirty coils and blower wheels, refrigerant leaks at flare fittings, sensor faults and failed inverter or control boards.
Written by Sylvia Denton, HVAC Guides Editor. Updated 2026-09-22.
Mini-splits pack a lot into a small unit. The indoor head holds the coil, a barrel-style blower wheel, a drain pan, sensors and a control board. The outdoor unit holds an inverter compressor that changes speed constantly, driven by its own electronics. That means diagnosis relies on error codes and electrical testing more than it does with a basic central system.
In Miami, the indoor head is where most problems start. It runs wet for months, and the small drain pan and line clog with slime and dust. Water then drips down the wall or out of the front of the unit. The blower wheel collects a mat of dust and mold that cuts airflow and sends out a musty smell.
Refrigerant leaks show up more often than on central systems, usually at the flare connections where the copper line meets the indoor and outdoor units. We tighten or remake flares, pressure test, and charge by weight.
