Essential maintenance to revive a device battered by time
At AirGreen , we know that regular HVAC cleaning is more than just a matter of aesthetics. It's a crucial step in preserving the performance, durability, and safety of your unit. Recently, our team worked in Côte-des-Neiges–Notre-Dame-de-Grâce , in a typical building in the area, to completely clean an Air Control wall-mounted air conditioner whose outdoor unit showed clear signs of neglect and wear.
Initial diagnosis: a device clearly in distress
The outdoor unit was installed on a small balcony, exposed to the elements and urban pollution. Upon our arrival, several signs indicated the need for thorough maintenance:
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The fan grille is oxidized and the blades are covered in rust.
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Accumulation of dust and debris between the fins of the heat exchanger.
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Increased noise when starting the compressor, a sign of an imbalance caused by dirt.
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Irregular water flow , indicating a partially blocked drain.
This type of situation is common in Montreal, especially when the units are installed on balconies where humidity and pollution accumulate. The lack of annual maintenance not only leads to a loss of efficiency, but also to increased energy consumption and a greater risk of premature breakdowns.
Complete cleaning process carried out by AirGreen
Safety preparation and inspection
Before any intervention, our technician carried out an electrical and mechanical check of the unit to ensure the stability of the wall fixings and the absence of refrigerant leaks. The unit was then switched off, and the surrounding area was protected to prevent any water from splashing onto the balcony or nearby furniture.
Partial dismantling and mechanical cleaning
We removed the front grille and the fan to access the heat exchanger.
Using a compressed air blower , we dislodged the ingrained dust between the fins. Next, a biodegradable, pH-neutral cleaner was applied to the oxidized surfaces, followed by a gentle, controlled-jet rinse to avoid bending the fins.
The fins were then manually brushed with a fine nylon brush to remove rust residue without damaging the aluminum.
We also treated the fan grille with an environmentally friendly rust remover , before applying a protective anti-corrosion coating .
Drain cleaning and drainage check
The drain was disassembled and flushed to remove any obstructions. This cleaning is essential to prevent water leaks and mold growth that can spread to the indoor unit. Once the drain was cleaned, we checked the slope and continuity of the pipe.
Checking the balance and restarting
After complete drying, we reassembled the components and then performed a full functional test . The fan now ran without any extraneous noise, and the restored airflow was both more stable and more powerful. The outlet temperature normalized, confirming improved energy efficiency .
The results: restored efficiency and cleaner air
After cleaning, the Air Control wall-mounted air conditioner was back to its optimal performance. The customer immediately noticed:
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A significant reduction in operating noise .
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An improvement in airflow .
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A decrease in electricity consumption .
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And above all, a feeling of freshness and clean air .
We concluded the service call by explaining to the client the importance of annual preventative maintenance . An outdoor unit exposed like this one, on a Montreal balcony, must be cleaned at least once a year — ideally in the spring — to prevent corrosion and breakdowns related to soiling.
Why entrust your HVAC cleaning to AirGreen
At AirGreen , we apply strict cleaning protocols that comply with manufacturers' standards. Our technicians use certified eco-friendly products and specialized equipment that allows us to clean effectively without damaging delicate components.
We operate throughout Greater Montreal , whether you are in Laval, Longueuil, on the North Shore or the South Shore , for the cleaning, maintenance and disinfection of your HVAC systems — heat pumps, wall-mounted air conditioners, central systems and more.
Our approach is based on three simple principles:
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Transparency in diagnosis and recommendations.
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Adherence to best practices in every intervention.
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Prevention before repair , in order to extend the life of your equipment and ensure the quality of the air you breathe.
In summary
The complete cleaning of this Air Control wall-mounted air conditioner in Côte-des-Neiges–Notre-Dame-de-Grâce demonstrates how regular maintenance can transform an aging unit into a high-performing and quiet system. Thanks to meticulous work, our team was able to restore the client's comfort while ensuring improved energy efficiency.
At AirGreen, every cleaning is a promise of durability and comfort , carried out with care, professionalism and passion for our work.