What Do I Need to Know About My Mini-Split Maintenance?
Mini-split systems are compact, efficient, and incredibly popular—but they require specialized care to keep them running their best. Unlike traditional systems, mini-splits have tight internal compartments, fragile components, and complex electronics that call for an experienced hand.
🧪 Refrigerant Checks Aren’t Always Routine
Checking refrigerant levels on mini-splits isn’t as simple as attaching gauges. In fact, many models don’t allow direct pressure checks without recovering and replacing the entire refrigerant charge—a complex process that should only be done when there’s a known issue. It's not part of standard maintenance, and unnecessary handling of refrigerant can do more harm than good.
🌀 What Should Be Cleaned and Inspected?
During your maintenance visit, your technician should always inspect and clean these key components:
Outdoor coils
Indoor coils
Blower wheels
Condensate drains
If these areas become dirty or blocked, your system’s efficiency and air quality can suffer.
💨 Indoor Blower Wheel Cleaning
While not always part of yearly maintenance, blower wheel cleaning is often added when needed. This is a problem area—over time, these wheels can develop buildup or biological growth. Cleaning them properly takes the right tools and techniques.
Professional HVAC uses specialized bib systems and low-pressure washers, often along with disassembling the unit’s front cover. Done right, this cleaning helps prevent odors, improve airflow, and keep your air healthy.
🧯 What Else Should Your Technician Check?
Inspect each indoor unit
Measure both return and supply air temperatures.
Observe system operation over time
Use an amp meter to monitor electrical performance and confirm the unit’s logic and cycling are functioning as intended.
Access the electrical compartment
Remove pests, nests, and debris that could cause problems.
⚠️ Why Not Every Part Is Tested
Because of the tight layout and delicate nature of mini-split units, it’s not always practical or safe to test every individual sensor or motor. Instead, experienced technicians look at overall system performance, test safe access points, and use trend data to identify any warning signs.
Mini-split maintenance is not a one-size-fits-all checklist—it’s a skill that requires judgment, patience, and the right equipment. At Professional HVAC, we ensure your technician is trained, thorough, and respectful of your space and your system. When it’s time to care for your mini-split, we’re here to help
