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Wall-mounted air conditioner cleaning in Montreal

A wall air conditioner used only in summer spends eight months switched off, damp inside, with last autumn’s dust. At the first start-up in June, everything that formed in the blower wheel and pan is blown into the room — hence the “old basement” smell many people take as normal. In a store, an office or a server room, a fouled AC is also a unit that struggles on the days it is needed most.

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In short

Cleaning a wall-mounted air conditioner means opening the indoor unit to wash what the filters do not protect: the evaporator coil, the blower wheel, the condensate pan and the drain. An air conditioner produces water all summer; the dust that settles there becomes a damp medium where mould and biofilm form. The best time is spring, before the first heat wave: the unit restarts clean just when it works hardest.

When should you call?

A musty smell comes out of the unit in the first warm days.
Air comes out less cold, or the unit runs constantly without reaching the setpoint.
Water drips from the wall unit or leaves a stain on the wall.
Black spots appear on the flap or the blower wheel.
The unit has never been opened since it was installed.
Several units serve a store or an office.

What's included

Protection of the wall, floor and belongings beneath the unit
Removal of the casing, flap and filters
Coil and blower-wheel washing with water collection
Condensate pan disinfection
Drain clearing
Restart and check in front of you

Typical duration: About 1 to 1.5 hours per wall unit.
Recommended frequency: Manufacturers recommend washing the filters regularly during the operating season. A deep cleaning once a year, in spring, is generally worthwhile; more often in a store, a kitchen or a high-occupancy space.

How we work

Protection and collection

The wall and floor beneath the unit are protected and a collection bib is fitted under it. No wash water touches your walls or your merchandise.

Opening the indoor unit

The casing, flap and filters are removed to reach the coil, blower wheel and pan — where odour and biofilm form.

Controlled-pressure washing

The coil and blower wheel are washed with an aluminium-safe product, then rinsed. Fins are straightened, never scrubbed.

Drain, reassembly and test

The pan is disinfected, the drain cleared, and the unit reassembled and restarted in front of you to check airflow and drainage.

Frequently asked questions

How is this different from heat pump cleaning?

The work on the indoor unit is the same. The difference is in use: an AC that only runs in summer stays damp and idle all winter, and spring is when it should be cleaned. A heat pump that also heats runs year-round and fouls faster.

Do you clean wall units in stores and offices?

Yes. The units in one space are done in the same visit, and the time window is agreed at quoting so it does not disrupt your business.

My AC is low on refrigerant: can you recharge it?

No. Anything involving refrigerant — recharging, leaks, outdoor-unit repairs — requires a licensed refrigeration technician. If we see a problem of that kind during the cleaning, we will tell you.

Service area

We provide wall-mounted air conditioner cleaning across Greater Montreal. Pick your city for what changes locally.

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