Short answer: Rinse the filters every few weeks when the system is running hard, and have the heads professionally deep-cleaned about once a year. Homes with pets, smokers or heads that run most of the year can need it more often. Efficiency Vermont recommends a professional cleaning every one to two years.
How often to clean each part of a mini split
| Part | How often | Who |
|---|---|---|
| Filters (the mesh screens under the front cover) | Every 2 to 6 weeks while it’s running | You |
| Front cover and vanes | Wipe down when you do the filters | You |
| Coil, blower wheel and drain pan inside the head | About once a year | A pro |
| Outdoor unit | Keep it clear of snow, leaves and grass all year | You |
Carrier recommends checking the filters every 4 to 6 weeks. In Vermont, a head that runs all day and night through the winter fills its filters faster, so check them more often in heating season.
Who needs a mini split cleaned more than once a year?
- Homes with pets, because hair and dander collect on the coil and blower wheel.
- Heads that run most of the year for both heating and cooling.
- Homes with smokers, wood stoves or a lot of cooking near a head.
- Bedrooms and basements where the air is damp in summer.
- Any head with a musty smell or black spots on the vanes or blower wheel.
Why do mini splits need professional cleaning if you rinse the filters?
Mini split filters are a thin mesh screen, not a pleated filter like a furnace has. Fine dust slips past them and sticks to the damp coil and the blower wheel (the long squirrel cage behind the vanes). Over time that buildup grows mold, slows the airflow and makes the unit work harder. The U.S. Department of Energy says a well-maintained heat pump can use 10% to 25% less energy than a badly neglected one.
What’s the best time of year to clean a mini split in Vermont?
Fall is a good time. Efficiency Maine points out that heads collect more dirt over the summer, and a fall cleaning gets them ready for the long heating season. Spring works well too, before the heads switch over to cooling. The most important thing is that it gets done each year.
What a yearly mini split cleaning includes with us
We open up each head and clean the coil, blower wheel, filters and housing with coil detergent and a rinse setup that catches the runoff, so nothing drips in your home. Our crew wears boot covers inside. With us, the first indoor head is $289, and the price per head goes down the more heads we clean in one visit. On our yearly plan, every cleaning after the first is $50 less.
Frequently asked questions
How often should a mini split be professionally cleaned?
About once a year for most homes. Efficiency Vermont recommends every one to two years, and homes with pets or heads that run most of the year often need it yearly or more.
How often should you clean mini split filters?
Every 2 to 6 weeks while the system is running. Carrier recommends checking them every 4 to 6 weeks, and more often in heavy use.
When is the best time to clean a mini split?
Fall, before the heating season, or spring, before cooling season. Heads tend to collect the most dirt over the summer.
What happens if you never clean a mini split?
Dust and mold build up on the coil and blower wheel, airflow drops, the unit works harder, and it can start to smell musty or drip water.
Do you offer a yearly mini split cleaning plan?
Yes. On our yearly plan, every cleaning after the first is $50 less.
Related guides
- Signs your mini split needs cleaning
- Why your mini split smells
- Mold in your mini split
- Cleaning a mini split yourself vs. hiring a pro
- How much mini split cleaning costs in Vermont
- Dryer vent cleaning
Sources
- Efficiency Vermont: How to clean and maintain your ductless heat pump system
- Efficiency Maine: Heat pump maintenance
- Carrier: Mini split maintenance
- U.S. Department of Energy: Operating and maintaining your heat pump
Book your yearly mini split cleaning
Mansfield Services cleans mini splits across Chittenden, Lamoille and Franklin counties. Book online in a couple of minutes, or call or text (802) 777-3210.
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