Your Local Mini-Split Repair Specialist

Ductless mini-split systems are one of the fastest-growing segments in residential and commercial HVAC — and for good reason. They're whisper-quiet, incredibly energy-efficient, and allow precise zone-by-zone temperature control without the need for ductwork. But when something goes wrong, you need a technician who truly understands these systems inside and out.

At SunDollar A/C & Heat, mini-split repair is one of our core specialties. Our technicians are trained on all major ductless brands — Daikin, Mitsubishi, LG, Samsung, Carrier, and more — and carry the diagnostic tools and replacement parts needed to get your system back up and running fast.

Common Mini-Split Issues We Fix

• Not Cooling or Heating: Whether it's a refrigerant leak, a faulty inverter board, or a blocked coil, we diagnose the root cause — not just the symptom.
• Water Leaking from the Indoor Unit: Clogged condensate drain lines are the #1 cause. We flush the line, clean the drain pan, and check for proper pitch.
• Blinking Error Lights: Mini-splits communicate problems through LED flash codes. Our team reads these codes and translates them into actionable repairs.
• Strange Noises: Clicking, buzzing, or rattling from the indoor or outdoor unit can signal anything from a loose fan blade to a failing compressor bearing.
• Foul Odors: Musty or sour smells typically mean mold has colonized the evaporator coil or blower wheel. We perform a full deep clean to eliminate the source.
• Remote or Thermostat Not Responding: We troubleshoot communication issues between the indoor unit, outdoor unit, and control board.

Why Mini-Splits Require Specialized Knowledge

Unlike traditional central air systems, mini-splits use variable-speed inverter compressors, sophisticated electronic expansion valves, and proprietary communication protocols between indoor and outdoor units. A general HVAC technician may not have the training or tools to properly diagnose these systems. At SunDollar, our team has hands-on experience with the unique engineering of ductless systems — from reading inverter board fault codes to checking superheat and subcooling on variable-speed compressors.

Preventative Maintenance Saves You Money

The best repair is the one you never need. We recommend a professional deep clean and inspection at least once a year. Regular maintenance keeps the evaporator coil clean, the drain lines clear, and the refrigerant charge optimized — preventing 90% of the emergency calls we see during peak summer and winter months.