A deep cleaning to breathe new life into an old wall-mounted air conditioner
At AirGreen , we are often called upon to refurbish HVAC systems that have been in service for several years. This was the case in Dorval , where a client contacted us for a complete cleaning of a Samsung wall-mounted air conditioner that had yellowed over time. The unit, installed in a bright room overlooking a large garden, had accumulated dust, humidity, and invisible deposits over the seasons.
Signs of a dirty air conditioner
Before our intervention, the client noticed several typical symptoms:
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Less fresh air and reduced airflow , even at maximum power.
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Unusual noise when starting up.
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A smell of dust and dampness is present every time it's started.
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Panels yellowed by time and the accumulation of micro-particles.
These signs indicated a prolonged lack of maintenance , common on older appliances. A thorough cleaning became essential to restore energy efficiency and improve indoor air quality .
Step 1: Inspection and dismantling
Our certified technicians began by unplugging the system and opening the front cover of the Samsung wall-mounted air conditioner. Inside, the air filters were completely clogged , and the evaporator fins had a thin layer of accumulated dust and grease.
Each component was carefully disassembled:
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Washable filters
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Directional flaps
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Front hood and ventilation grilles
Step 2: Cleaning the filters and internal surfaces
The filters were washed with warm water and a biodegradable cleaner , then rinsed and air-dried. We then applied an environmentally friendly disinfectant to the internal ducts to eliminate any traces of mold or bacteria that could be harmful to the health of the occupants.
The evaporator fins were cleaned using a low-pressure water jet , combined with a soft brush to preserve their integrity. This step is crucial: it restores airflow and improves heat transfer between the ambient air and the refrigerant.
Step 3: Degreasing the fan and drain
The centrifugal fan , often overlooked during routine maintenance, was removed and thoroughly cleaned . The team also cleared the condensation drain , which contained sticky deposits causing minor leaks on the wall. An antifungal treatment was applied to the water collection tray to prevent recurrence.
Step 4: Drying, reassembly and final testing
After a complete drying period, the system was reassembled and tested . The Samsung wall-mounted air conditioner restarted silently, diffusing purified, cool, and pleasant air. The customer immediately noticed the difference.
"It feels like my unit is brand new! The air is much softer and the room cools down faster."
Results and benefits after cleaning
Thanks to this intervention:
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The airflow increased by almost 40%.
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Energy consumption has decreased because the compressor now operates without overload.
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The indoor air is healthier , without dust or residual odor.
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The device, although old, has been given a second life both aesthetically and functionally .
Essential maintenance to extend the lifespan of your system
At AirGreen , we recommend a complete cleaning of your wall-mounted air conditioner every 12 to 18 months , depending on usage and environment. This allows for:
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To prevent the accumulation of dirt and mold.
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To ensure optimal performance throughout the season.
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To prevent costly breakdowns and health problems related to air quality.
Our technicians cover Montreal, Laval, Longueuil, the North Shore and the South Shore , offering meticulous, fast service that meets Samsung manufacturer standards .