Mini-splits are known for their energy efficiency and reliability, but like any HVAC system, they require regular maintenance to keep them running smoothly. Without proper care, dust buildup, clogged filters, and neglected components can reduce efficiency and increase energy costs.
If you live in Boston, Lexington, or Arlington, ensuring your mini-split is properly maintained will help you stay comfortable year-round while lowering heating and cooling costs.
Need professional maintenance? Contact Lund Plumbing & Heating for expert mini-split service in the Boston Metro area.
1. Clean or Replace Air Filters Regularly
Why It Matters:
- Dirty filters restrict airflow, reducing efficiency.
- A clogged filter can increase energy consumption by up to 25%.
- Clean filters improve indoor air quality by removing dust and allergens.
How Often Should You Clean Mini-Split Filters?
- Every 2-4 weeks during peak use (summer & winter).
- Every 1-2 months during light-use seasons (spring & fall).
- More frequently if you have pets, allergies, or smoke indoors.
Pro Tip: In high-pollen areas like Medford and Winchester, cleaning filters more frequently helps reduce allergens inside the home.
Related: Learn how mini-splits improve indoor air quality.
2. Keep the Outdoor Unit Clear of Debris
Why It Matters:
- Leaves, dirt, and snow can block airflow and reduce system efficiency.
- Debris buildup can lead to overheating or frozen coils.
- Proper airflow helps maintain consistent heating and cooling performance.
Maintenance Tips:
- Trim bushes and plants at least 2 feet away from the outdoor unit.
- Remove leaves, dirt, and snow from around the unit regularly.
- In winter, check for ice buildup and gently clear it if needed.
Best Practice: If your outdoor unit is mounted on a wall, ensure that no gutters drain directly onto it to prevent ice formation in winter.
Related: Learn how mini-splits perform in extreme cold and how to prevent winter issues.
3. Clean the Evaporator & Condenser Coils
Why It Matters:
- Dirty coils make your system work harder, increasing energy costs.
- A clean coil allows better heat exchange, improving efficiency.
- Regular cleaning extends the lifespan of compressors and fans.
How to Clean Mini-Split Coils:
- Turn off the system.
- Use a soft brush or vacuum to remove dust from the evaporator coil.
- For deeper cleaning, use a coil cleaner spray (available at hardware stores).
- Check the outdoor condenser coil for dirt buildup and rinse with a hose if needed.
Pro Tip: Homes in Brookline and Newton near trees or high-pollen areas should clean coils at least twice per year.
Considering professional maintenance? Contact Lund Plumbing & Heating for a coil cleaning service.
4. Inspect & Clean the Condensate Drain Line
Why It Matters:
- Prevents water leaks and humidity issues.
- Reduces the risk of mold and mildew growth inside the system.
- Ensures proper drainage to prevent overflow damage.
Signs of a Clogged Drain Line:
- Water dripping from the indoor unit.
- Musty smells or mold growth near the mini-split.
- The system shuts off unexpectedly due to a full drain pan.
How to Clean It:
- Use a wet/dry vacuum to remove blockages.
- Flush the drain line with a mix of vinegar and water every few months.
- If water backup continues, schedule a professional inspection.
Pro Tip: In humid areas like Boston and Cambridge, drain lines should be checked before summer starts to prevent condensation overflow.
Related: Learn how to choose the best mini-split for your home based on climate needs.
5. Schedule Professional Maintenance Annually
Why It Matters:
- A trained technician can spot issues before they become costly repairs.
- Ensures optimal refrigerant levels for peak performance.
- Extends the lifespan of the mini-split system.
What’s Included in Professional Mini-Split Maintenance?
- Deep cleaning of coils and filters.
- Inspection of electrical components and refrigerant levels.
- Testing for leaks or blockages in the system.
Best Practice: Homeowners in Lexington and Arlington who use mini-splits as their primary heat source should schedule fall and spring tune-ups to ensure peak efficiency.
Need a service appointment? Contact Lund Plumbing & Heating for professional mini-split maintenance.
Final Thoughts: Keep Your Mini-Split Running Like New
Regular maintenance maximizes efficiency, reduces energy costs, and extends the system’s lifespan.
At Lund Plumbing & Heating, we help homeowners:
- Perform routine mini-split cleaning and upkeep.
- Diagnose and fix performance issues.
- Schedule professional tune-ups for long-term reliability.
Call (781) 944-2222 or schedule a consultation to keep your mini-split in top condition year-round.
