Mini Split Cleaning
in Lexington, MA

Why Lexington Systems Work So Hard

Lexington's housing ranges from historic Colonials to distinctive mid-century neighborhoods such as Peacock Farm, where modern split-level designs became part of the town's architectural identity. Today, Lexington is also leading the move toward electrification.

Since March 21, 2024, the town's fossil-fuel-free building bylaw has required new construction and qualifying major renovations to avoid fossil-fuel systems, with certain exceptions. That means more newly built and extensively renovated homes are turning to electric heat pumps and mini-splits for year-round heating and cooling. Older Lexington homes without existing ductwork benefit too, because mini-splits go in with far less disruption to historic walls, ceilings and woodwork.

As these systems become the primary source of comfort rather than occasional air conditioning, deep cleaning matters more here than it does on a unit that only runs in July and August. It keeps airflow up, odors down and the system working the way it should through every season.

A Recent Lexington Job

Franklin Road

A Mitsubishi Mr. Slim wall unit in a second-floor bedroom. Mold across the drain pan and vanes, and a blower wheel that had gone completely black. Full teardown: wheel pulled and washed outside, coil, drain pan and condensate line flushed, filters cleaned, outdoor unit rinsed, system tested before we left.

What a Deep Clean Includes

Questions We Get in Lexington

Why does my mini-split smell musty when it starts up?

That smell is almost always the blower wheel. It's the barrel-shaped fan behind the vanes, and it stays damp through the cooling season because that's where condensation forms. Dust sticks to it, the damp keeps it there, and mold grows on the wheel and down into the drain pan underneath. Nothing you can spray in the vents reaches it — it has to come apart.

What's the black stuff I can see inside my unit?

If you shine a light up past the vanes and see black or grey speckling, that is mold on the blower wheel and the housing around it. The photos above are exactly that, from a Lexington home. It isn't dirt that wipes off — it grows into the plastic and the foam around the drain pan.

My mini-split is the only heat in the house. Does that change anything?

Yes, and it's increasingly the Lexington situation. A system carrying the whole house runs twelve months a year instead of three — roughly four times the hours of a cooling-only install — so it collects far more before anyone thinks to look inside.

Will you make a mess in my house?

No. We bib the unit, drop-cloth everything underneath and run the wash water down into a bucket. Look at the drop cloth in the photos above: that black is what came out of the system, and it's the reason we cover the room before we start.

How much does it cost?

It depends on how many indoor and outdoor units you have. The instant price calculator gives you a real number in about thirty seconds — no phone call, no waiting for a quote.

Book a Cleaning in Lexington

Also serving Cumberland RI · Londonderry NH · Raymond NH · Pepperell · Concord · Franklin · Brighton · Falmouth · Bedford · Chelmsford · every town we cover