Maintenance

Mini Split Cleaning Service in Town of Mount Royal – A Job Well Done!

Discover how AirGreen's professional cleaning restored a dirty mini-split system in Ville Mont-Royal, improving efficiency and eliminating bad odors. Find out why regular cleaning is important!

By AirGreen Climatisation & Chauffage Admin7 min read
Mini Split Cleaning Service in Town of Mount Royal – A Job Well Done!
Mini Split Cleaning Service in Town of Mount Royal – A Job Well Done!
Generic diagram: wall-mounted heat pump, indoor and outdoor units

In summer, the outdoor unit rejects the house's heat outside.

Generic illustration of this type of installation, not a survey of this job site. Tap a number.

  1. Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.

  2. The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.

  3. Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.

  4. A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.

  5. The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.

  6. On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.

  7. The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.

When Efficiency Plummets, We Bring Your Mini Split Back to Life!

At AirGreen, we pride ourselves on providing exceptional HVAC services across Montreal, Laval, Longueuil, the North Shore, and South Shore. Our team recently answered a service call in Town of Mount Royal (Ville Mont-Royal), where a customer reached out with concerns about their mini split unit. Their machine had started to show clear signs of inefficiency: a noticeable drop in cooling performance, bad odors circulating throughout the room, and increased energy consumption. These issues pointed to one inevitable truth – the mini split was in desperate need of a deep cleaning.

We’ve always advocated that proper maintenance is crucial for the longevity and efficiency of HVAC systems, especially mini splits. Over time, dust, dirt, and mold build up on internal components, leading to diminished performance and unwanted smells. That’s exactly what we found during this service call – the mini split unit was extremely dirty, contributing to the system's poor performance.

The Scene: A Dirty, Smelly, and Inefficient Mini Split

Upon arriving at the Town of Mount Royal residence, we immediately assessed the situation. The machine was covered in dust and mold, particularly around the evaporator coils and the fan. These parts are responsible for transferring heat and circulating air efficiently, so any obstruction, like the thick layer of dirt we encountered, severely impacts the system's performance.

The customer had also complained about a musty odor permeating the room whenever the mini split was running. This smell was being caused by mold and mildew growing inside the unit – a common issue with uncleaned systems. This buildup not only affected the air quality but also the health and comfort of the occupants. It's a classic example of what can happen when regular mini split cleaning is overlooked.

Our Cleaning Process: Meticulous and Professional

At AirGreen, we take great pride in the thoroughness of our cleaning services. For this mini split, we followed our step-by-step cleaning process, ensuring that every part of the system was returned to peak condition. Here’s how we handled it:

  1. Preparation and Initial Inspection:

    • We began by carefully removing the outer casing of the mini split to access the interior components. Our technicians inspected the air filters, evaporator coils, and fan for the level of dirt and grime. It was clear from the start that a deep clean was necessary.
  2. Cleaning the Air Filters:

    • First, we tackled the air filters. These are the first line of defense against dust and debris, and they were completely clogged. After removing the filters, we gave them a thorough wash using a mild detergent and allowed them to dry before reinstalling. Clean filters are critical for maintaining healthy indoor air quality and optimal system efficiency.
  3. Deep Cleaning the Evaporator Coils:

    • Next, we cleaned the evaporator coils, where most of the dirt and mold had accumulated. We used specialized coil cleaner to dissolve and remove the grime, allowing the coils to efficiently transfer heat once again. This step is vital in restoring the mini split’s cooling capabilities.
  4. Disinfecting and Deodorizing:

    • After removing the physical dirt, we applied a disinfectant to kill any remaining bacteria and mold spores. This not only eliminated the musty smell but also ensured that the air circulating through the house was fresh and clean. We always use eco-friendly products that are safe for both the environment and the household.
  5. Inspecting the Drainage System:

    • We also checked the drainage line for blockages, as clogs can lead to water buildup and cause leaks or water damage. In this case, the drainage system was partially obstructed, so we flushed it out, ensuring smooth water flow and preventing any future problems.
  6. Final Testing:

    • Once the cleaning was complete, we reassembled the unit and turned it on for testing. Immediately, the customer noticed a significant improvement in both the cooling efficiency and the air quality. The machine ran smoothly, quietly, and without the unpleasant odors that had plagued them before.

Customer Satisfaction: A Job Well Done

Our customer was thrilled with the results of our work. They noticed an immediate difference – the mini split was operating more quietly, cooling the room more effectively, and the bad odor was completely gone. A clean mini split isn’t just about restoring comfort; it’s also about energy savings. A dirty unit can use up to 30% more energy, so by cleaning it, the customer will likely see a reduction in their utility bills as well.

They thanked our team for the professionalism and efficiency we demonstrated throughout the process. We always aim to leave our customers not only satisfied but also educated about the importance of regular maintenance.

Why Regular Cleaning Matters

Mini splits are incredibly efficient, but they can lose efficiency quickly if not properly maintained. Dirt buildup on the evaporator coils reduces heat transfer, making the system work harder to cool the space. Over time, this extra strain can lead to more serious issues, including compressor failure or refrigerant leaks, which are costly to repair.

Air quality is another critical concern. A dirty mini split recirculates dust, allergens, and mold into the air, potentially causing health issues for those with asthma, allergies, or other respiratory conditions. That’s why we recommend scheduling regular cleanings, at least once a year, to keep your system running smoothly and your indoor air healthy.

Choosing AirGreen for Your Mini Split Cleaning

At AirGreen, we don’t just clean your mini split – we restore it to its original efficiency. Our technicians are trained to handle even the most challenging cleaning jobs, ensuring your system performs at its best year-round. We specialize in servicing homes across Montreal, Laval, Longueuil, North Shore, and South Shore, and we’re known for our attention to detail and commitment to customer satisfaction.

Here’s what sets us apart:

  • Experienced Technicians: Our team is fully trained and experienced in all aspects of HVAC maintenance and repairs. We use the latest tools and techniques to ensure your mini split is thoroughly cleaned and operating efficiently.
  • Eco-Friendly Products: We care about your home and the environment. That’s why we use eco-friendly cleaning products that are safe for your family and pets.
  • Customer Education: We believe in empowering our customers with knowledge. After every cleaning, we walk you through the work we’ve done and offer tips for keeping your system in top shape between professional cleanings.

We’re proud of the work we did for this Town of Mount Royal customer, and we’d love to help you, too! If your mini split is showing signs of inefficiency, don’t wait until the problem gets worse. Contact AirGreen today for a thorough cleaning and restore your system’s performance.

The steps

How it goes, from the first call to the end

The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.

Step 1 of 5The appointment

The type of unit, its age and what you have noticed: noise, smell, water, lower output.

  1. The appointmentThe type of unit, its age and what you have noticed: noise, smell, water, lower output.
  2. InspectionFilters, coils or core, drain, fans, connections and clearances.
  3. CleaningDirty parts are cleaned following the manufacturer's recommendations.
  4. ChecksOperation, water drainage, noise and airflow.
  5. The reportWhat was done, what to watch and when to come back.
Through the seasons

What to do, season by season

Three habits per season for this unit. They take a few minutes and prevent many calls.

  • Clean the indoor unit's filters.
  • Clear leaves and debris left on the outdoor unit by winter.
  • Test cooling before the first hot days.
And at your place?

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Frequently asked questions

What people ask us about this kind of work

9 questions
How often should maintenance be done?
It depends on the unit and how it is used; the manufacturer gives the frequency. Filters get checked much more often than the full service.
Does maintenance improve performance?
A dirty filter, coil or core cuts airflow and makes the unit work harder. Cleaning them restores the airflow.
Does a wall-mounted heat pump heat in winter?
Yes, it heats and cools. Its capacity drops in very cold weather; the operating range depends on the model and is listed on its spec sheet.
Wall-mounted or multi-zone: how do I choose?
One wall head and one condenser outside: the direct solution for a room or an open area. For two to five rooms, a multi-zone puts one head in each room on a single condenser.
Where does the outdoor unit go?
Where it stays above the snow, clear and accessible, away from walkways. We decide it with you during the estimate.
Are there grants?
Depending on the model and your situation, assistance programs may apply, including Hydro-Québec's LogisVert. AirGreen checks the model number before quoting an amount. See the grants.
Do I need a permit?
Rules vary from city to city: location, distances, noise. See permits and by-laws, and we check for your address.
Does AirGreen hold the required licences?
Yes. AirGreen holds RBQ licence 5645-9605-01, subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electricity.
Is the estimate free?
Yes. The on-site estimate is free and the quote follows within 24 hours. Book my free estimate.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).

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