Ductless mini splits are superb systems that deliver zoned cooling and heating when and where other system options can not. Like any other home-comfort system, ductless mini splits need regular care to provide peak performance. The specialized tasks, such as checking refrigerant, drainage and electrical components, require the skill of a certified HVAC professional, but do-it-yourself ductless mini split maintenance tasks are simple enough to include with chores around the household and yard.

DIY ductless mini split maintenance

Ductless mini splits need free airflow to promote optimal heat exchange from the refrigerant, just like larger conventional heat pumps (and A/C systems). To maintain free airflow, components need an occasional cleaning.

  • First, turn off the power at the main circuit panel for safety.
  • Remove the air filter at each indoor air handler and rinse clean. Let the filter(s) dry before reinserting. Check filter(s) once a month during high usage periods. A dirty filter quickly increases energy consumption and strains components.
  • Remove the cover from the air handler. Gently wipe all visible dust and debris from the air quality components and the evaporator.
  • The evaporator coil removes moisture from indoor air. Without regular cleaning, mold and mildew growth can occur. If you smell or see mold and mildew, let your HVAC professional know so that these components, and the drainage system, can be treated to resist future contamination.
  • Remove any debris that is stuck to or is near the outside cabinet.
  • Make sure the area around the cabinet is free of obstructions, such as hedges and fencing, for three to four feet in all directions.
  • If you use a water-sprinkling system, check to see if any of the sprinklers spray the unit. While the outside cabinet and components are resistant to the elements, chemicals in treated water can cause corrosion.
  • During the heating months, keep snow and ice accumulation away from the unit.
  • Schedule professional preventive maintenance in the spring (and during the fall if you use your ductless mini split for heating).

For more ductless mini split maintenance tips, contact Stack Heating & Cooling today. We proudly serve homeowners throughout northeast Ohio.

Our goal is to help educate our customers in Cleveland, Ohio about energy and home comfort issues (specific to HVAC systems).  For more information about ductless mini split and other HVAC topics, download our free Home Comfort Resource guide.

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