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.
Services
Wall-mounted air conditioner cleaning in Montreal
Free and no obligation · a clear quote before any work starts · you pay only once the job is done and you’ve seen the result.
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 dirty AC unit is also one that struggles on the days it is needed most.
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. Under normal use, a deep cleaning every 3 to 6 years is enough; it becomes yearly when the unit runs a lot, with pets or allergies, or in a business. Spring, before the first heat wave, is the best time.
Recognize any of these signs?
Tell us what you’re noticing and we’ll tell you whether cleaning is worth doing now. Free quote, no obligation.
How we work
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.
Why choose Nettoyage Service Plus
- Our own technicians, NADCA and IICRC certified. Nothing is subcontracted — that’s how we can stand behind the results.
- Your home is protected. Floors and walkways are protected on arrival; everything is put back and tidied before we leave.
- No surprises. Travel is included in the quote. If what we find on site differs from what was described, we talk to you before continuing — never after.
- You pay once the job is done and you’ve seen it. If anything isn’t right, we redo it — just tell us before we leave or call the same day.
- You don’t have to stay home. Someone just needs to let us in and show us the equipment and vents — after that, you’re free to go about your day.
Why don’t we post prices? Because the cost depends on the number of vents, the size of the home, the system’s actual condition and access. All questions →
Free quote
Get a free quote
Three fields, no obligation. Or call — most quotes are settled in a few minutes on the phone.
Service area
We provide wall-mounted air conditioner cleaning across Greater Montreal. Pick your city for what changes locally.
MontrealLavalLongueuilBrossardTerrebonneRepentignyBouchervilleDollard-des-OrmeauxPierrefonds-RoxboroCôte Saint-LucSaint-EustacheVaudreuil-DorionBeloeilBlainvilleBois-des-FilionBoisbriandCandiacChamblyChâteauguayDorvalKirklandL'AssomptionMirabelMount RoyalSaint-Bruno-de-MontarvilleSaint-ConstantSainte-ThérèseVarennesWestmount All cities →
Other services
Wall-mounted heat pump cleaning
Cleaning a wall-mounted heat pump (mini-split) means partially dismantling it to wash what simply dusting the filters never reaches: the exchange coil, the blower wheel, the condensate pan and the drain line.
Air exchanger cleaning
An air exchanger (HRV or ERV) renews the air in an airtight home by expelling stale air while recovering heat from it.
Commercial duct cleaning
Commercial duct cleaning removes the dust and contaminants accumulated in the ventilation system of a non-residential building — offices, retail, clinics, daycares, rental buildings.