Ductless Mini Split Maintenance: What You Can Do and What We Do

Check them about monthly during heavy use and clean them when you can see dust building up. Homes with pets, renovation dust or smoking may need it more often. A clean filter helps airflow and keeps dust off the coil.

We do not recommend it. The coil and blower sit close to the control board, and water or the wrong technique can cause damage or leave residue. A technician has the right tools and protection for it.

Dust, moisture and a damp drain tray or coil can cause odours. Clean the filters first. If the smell stays, it may need a coil, tray and blower clean by a technician.

Yes. Keep it free of leaves, snow and obstructions, and have the outdoor coil, fan and electrical connections checked during a service. Do not use a pressure washer on the coil.

Manufacturer warranties may expect records of regular service, so check yours.

Turn the unit off with the remote, open the front panel and slide the filters out. Vacuum them or rinse gently in lukewarm water, let them dry completely, then refit them. Do not use hot water or harsh cleaners, and do not run the unit without filters. Wipe the outside with a soft damp cloth.

Yearly is a typical schedule, and homes with pets, dust or heavy use may benefit from more. Follow the manufacturer's instructions, since some warranties ask for records of regular service. A technician cleans the coil and blower wheel, checks the drain and electrical connections and runs both modes.

Yes. Keep the outdoor unit clear of snow, drifts and ice, and keep cleaning the filters, since heads in heating mode still collect dust. A technician also checks the outdoor base for drainage. If the unit ices over or stops heating, call us.

They help dry the coil after cooling, which limits moisture and odour. They do not replace filter cleaning or a deep clean of the coil and blower wheel, where dust and residue build up over time. Use them as a supplement, and still book a yearly service.

Pet hair, cooking residue and smoke can clog filters and coat the coil and blower wheel, which reduces airflow and can cause odours. Clean the filters more often in those homes. Heavy residue needs a technician, because the coil and blower sit close to the electronics.

Keep a list of units by address with the model and last service date. Give tenants simple filter instructions, and schedule annual technician service with proper notice under Ontario tenancy rules. Written records help if a tenant reports a problem. See property management HVAC.

Mount it on a raised stand or wall bracket above the usual snow line, and keep roof snow and icicles from falling onto it. Brush drifts clear by hand and avoid sharp tools. If heavy snow is forecast, check the unit afterward.