Ductless Systems Maintenance

Keep your unit running smoothly year after year.

Proactive tips for peak performance

Ductless systems are a flexible solution for rooms where ductwork isn’t available. While most ductless system maintenance should be performed by a certified dealer, there are a few preventative maintenance measures you can take to maximize the efficiency of your unit. Before starting any ductless system maintenance, remember to turn off each component in the system, including the outdoor and indoor units.

Keep the system clean

Wipe down the outside of the unit with a damp cloth to prevent dust from accumulating.

Make sure there is space around the unit
Keep space around the unit

Don’t put bookcases, picture frames or any other furniture close to a ductless system.

Clean the filters

Each indoor evaporator unit has a removable air filter that should be cleaned regularly. Clean these filters at least as often as recommended in your owner's manual, or more often if your family is sensitive to dust or if you own pets.

Clean the condenser

Make sure the outdoor unit is powered off, then, using a garden hose, spray any dust and dirt off of the coil. Avoid using high water pressure, as the fins can be easily bent. If you accidently bend some of the fins, they can be easily bend back into place with a special alignment comb.

Disclaimer: The following information is for educational purposes only. Tampering with your system may void your warranty. If you have any questions about your system, call a Trane Comfort Specialist™.

Need Emergency Service?

If this is an emergency, then please contact local Trane Comfort Specialist™ for assistance regarding your ductless system.

Contact a Dealer Find a Dealer

Your mini-split system should be serviced by a professional at least once per year. Here are a few of the things your specialist will check for:

  • Check electrical connections. All electrical connections inside the condensing unit should be spot-checked for loose connections, short circuits or evidence of overheating.
  • Check the run capacitors. The run capacitors should be checked for bulging, deformation or leaks. If any are present, faulty run capacitors should be replaced.
  • Look for refrigerant leaks. Refrigerant lines should be checked for signs of leaks, and patched or replaced where necessary. Leaks are especially common at flare connections, which may need to be tightened.
  • Check the drain hose for blockages. The hose that moves condensation from the evaporator units should also be checked to make sure water is flowing freely.
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