Cleaning a Midea wall-mounted air conditioner in Ville Mont-Royal

Restore the life and performance of a Midea air conditioner with a deep cleaning by AirGreen

At AirGreen , our mission is clear: to ensure the comfort, health, and durability of every HVAC system we service. Recently, our team worked in a residence in Ville Mont-Royal where a Midea wall-mounted air conditioner was showing signs of advanced fouling. Although the unit still appeared to be working, the owner noticed a noticeable drop in airflow and a persistent odor upon startup. Two telltale signs of an urgent need for professional cleaning .

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Initial diagnosis: a saturated filter and a clogged exchanger

Upon opening the hood of the wall-mounted unit, our technicians immediately noticed something many users are unaware of: the air filters were completely covered in a thin layer of dust and microfibers. These filters, although designed to trap impurities from the ambient air, had themselves become a barrier to airflow.

The heat exchanger (evaporator), located behind the filters, also had a buildup of dirt mixed with moisture—an environment conducive to the proliferation of bacteria and mold. These deposits not only reduce energy performance, but also compromise indoor air quality.

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Step 1: Complete inspection of the Midea indoor unit

Before any intervention, we carry out a complete visual and technical inspection :

• Checking the motorized shutter and airflow.

• Checking the temperature probe and electronic card.

• Observe the condensate drain for any signs of obstruction.

• Quick test of the fan (turbine) at maximum speed.

This first step allows us to assess whether the problem is purely maintenance-related or whether there is a deeper malfunction. In this specific case, no electrical fault was detected; the main cause was the accumulation of dust and microorganisms .

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Step 2: Disassembly and cleaning of the filters

The filters have been carefully removed and cleaned with a biodegradable antibacterial product. At AirGreen, we favor eco-friendly products without chemical fumes , perfect for residential use.
After rinsing with warm water and drying thoroughly, the filters regained their original color and, above all, their initial filtration capacity.

💡 AirGreen Tip : Wall-mounted air conditioner filters should be cleaned every 4 to 6 weeks during the summer, especially in urban environments like Montreal.

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Step 3: Deep cleaning of the evaporator

We then proceeded to clean the evaporator coil (the central part of the indoor unit).
Using a low-pressure sprayer and a specific HVAC detergent, our technicians removed the deposits accumulated between the fins of the exchanger.
Once the product was applied, the evaporator was rinsed under controlled conditions to avoid damaging the electrical components. This cleaning restores the thermal conductivity of the coil and ensures optimal exchange between the ambient air and the refrigerant.

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Step 4: Cleaning the turbine and condensate tray

Another often overlooked point is the blower turbine . When clogged, it loses power and projects particles into the ambient air.
Our specialists dismantled the casing in order to carry out a complete rotary cleaning , eliminating all traces of dust, mold and sticky deposits.
The condensate tray has also been disinfected to prevent any development of biofilm and bad odors.

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Step 5: Final check and performance test

Once all the parts were cleaned and reassembled, we carried out a complete functional test :

• Measurement of the blowing temperature.

• Checking the airflow in cooling mode.

• Noise level observation.

• Check for condensation and proper drain flow.

Result: a blowing temperature 4°C lower than the initial measurement, proof of better thermal efficiency . The customer immediately noticed fresher, cleaner air and quieter operation .

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The Importance of Preventative HVAC Cleaning

This type of service demonstrates that regular maintenance is not a luxury, but a necessity. A Midea wall-mounted air conditioner serviced by AirGreen:

• Consumes up to 20% less energy.

• Extends its lifespan by several years.

• Preserves indoor air quality , essential for health.

• Prevents costly breakdowns due to evaporator overheating or freezing.

We recommend all our clients schedule an annual professional cleaning , ideally before the start of the summer season, to ensure optimal performance.

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An AirGreen intervention in Ville Mont-Royal: efficiency and transparency

Our certified technicians left the premises clean, free of product spills and odors . The customer, satisfied with the results, received personalized advice on maintenance frequency and the optimal configuration of his remote control.
At AirGreen , every service is performed with rigor, respect, and passion for the job . Whether it's a cleaning , a repair , or a complete installation , our team remains your trusted partner for all your HVAC needs in Montreal, Laval, Longueuil, on the North Shore and the South Shore .

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Summary of the intervention

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The final word

A clean air conditioner is a high-performance air conditioner. By entrusting the maintenance of your unit to AirGreen, you're investing in the reliability and longevity of your HVAC system, while breathing healthier air every day.