When traditional ductwork is not an ideal choice for a home or business, an HVAC contractor may install a ductless mini split instead. The advantages of a ductless system include less expensive installation and operational costs when compared to traditional ducted systems, as well as simpler maintenance. Because a ductless mini split is easy to maintain, you can do some of the simple maintenance tasks yourself, without the help of a professional.
- Clean the primary mesh filters once or twice a season depending upon how clogged they become in your location. However, if the ductless mini split is in a laundry area or in a large facility, such as a warehouse, you might need to clean these filters every month.
- Remove and clean the indoor quality (IAQ) filtration components after 400 hours of operation (about every two to six months).
- Examine the evaporator (indoor cooling) coils annually for debris and clean them biannually. Use a soft-bristled vacuum attachment to clean the coils. If necessary, use a solution of bleach diluted with water to remove grime- often this activity is best left to a trained technician unless you are pretty handy.
- Check the drain pan for moisture. To clean the pan, use a diluted bleach solution. If you do find water in the drain pan, often it is a good idea to contact an HVAC technician to inspect the ductless mini split.
- Verify that the blower and fan wheel are in balance. If not, contact an HVAC service technician. To clean the fan, use a soft-bristled vacuum attachment for dust and diluted bleach for grime.
- Check the condition of the condensing unit (located outside). The interconnecting tubing should not have any bumps, and the insulation should be in good shape. Make sure the unit is still mounted on its base well, and that the base has not moved, gotten out of level or slipped.
- Remove any vegetation and clutter from within 18" of the unit.
While you can perform simple maintenance on a ductless unit by yourself, you should schedule an annual professional inspection of the unit. A professional technician can find and fix problems that you may not notice (or fix on your own), thus extending the life of the ductless system. Lack of required maintenance can invalidate manufacturer warranties, so it is always a good idea to schedule annual (for cooling only units) or semi-annual maintenance for heat pump version of the ductless split system.
For more expert advice about ductless mini-split maintenance and other issues related to home comfort, please contact P.K. Wadsworth Heating & Cooling. We’ve been serving the greater Cleveland area since 1936.
Paul Wadsworth is the President and Owner of P.K. Wadsworth Heating and Cooling. For 37 years, Paul has been providing heating and cooling services to the Greater Cleveland area. P.K. Wadsworth has been a trusted Cleveland HVAC service company for 75 years. The company understand the area's construction and local heating and air conditioning needs. Paul has an MBA from the University of Michigan and a B.S., Industrial Engineering from Purdue University. He's been President of the Cleveland Air Conditioning Contractors of America and a founding member of the local chapter. Paul was born and raised in Cleveland and has been active in the local community. He resides in Cleveland, Ohio with his wife and two sons.
The opinions and statements contained in this article are for general informational purposes only and are not instructions. Only trained, licensed and experienced personnel should attempt installation/repair. The author assumes no liability for the opinions/statements made in this article. Any individual attempting a repair or installation based on this article does so at their own risk of loss.