A thorough cleaning intervention for an old wall-mounted appliance
At AirGreen , we recently performed a complete cleaning of a wall-mounted air conditioner in an apartment in Montreal's Côte-des-Neiges neighborhood. The client contacted us after noticing decreased performance and an unpleasant odor when the unit was running. The unit, a Sanyo model installed several years prior, showed clear signs of internal fouling.
Initial diagnosis: clogged filters and obstructed fins
Upon our inspection, we noted that:
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The filters were saturated with fine dust , reducing airflow.
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The evaporator fins were covered with a greasy, sticky film.
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The condensation drain showed early signs of obstruction, which could eventually lead to water leaks.
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The unit emitted a slight whistling noise due to an imbalance in airflow.
These symptoms are typical of a wall-mounted air conditioner used without regular cleaning, especially in urban environments like Montreal where dust and microparticles accumulate easily.
Steps in professional cleaning
Our team carried out a complete cleaning according to AirGreen protocols , following several key steps:
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Protection of the intervention zone
We covered the wall and the nearby door with a tarpaulin to prevent any splashing of cleaning solution. -
Removal of the filters and front cover
The filters were removed, cleaned with warm water and mild soap, then rinsed with high pressure.
The front crankcase was carefully degreased with an environmentally friendly, biodegradable product , free of harmful solvents. -
Evaporator and fan cleaning
Using a low-pressure jet and an antibacterial disinfectant solution , we removed the mold deposits and accumulated dirt from the fan fins and blades. -
Drain inspection and flow test
The condensation drain was unblocked and purged , then tested with a water flow to ensure perfect drainage. -
Reassembly and final performance test
After complete drying, we reassembled the unit and checked the blowing pressure, the air outlet temperature, and the noise level.
Result: restored efficiency and purified air
The result was immediate :
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The wall-mounted air conditioner has regained its full cooling power .
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The unpleasant smells have disappeared .
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The customer noted a smoother and cooler airflow from the first start-up.
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The noise level of the device has decreased, evidence of a better balanced airflow.
The importance of regular maintenance
At AirGreen, we always remind our customers to have their HVAC system cleaned at least once a year , especially before the summer season.
Regular maintenance allows for:
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To avoid costly breakdowns.
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To improve indoor air quality.
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To extend the lifespan of the system.
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To reduce energy consumption.
Our AirGreen approach
We exclusively use environmentally friendly products and safe methods , adapted to each type of HVAC equipment.
Our qualified technicians operate throughout Greater Montreal , whether in Laval, Longueuil, on the North Shore or the South Shore , always with the same rigor and attention to detail.
At AirGreen , our mission is simple: to offer each customer healthier air, optimal comfort and lasting peace of mind .
For all your wall-mounted air conditioner or heat pump cleaning needs , trust our experienced team — comfort starts with quality maintenance.