Home » Some of Our Service Calls in Greater Montreal » Maintenance of a wall-mounted air conditioner in Outremont
Entretien d’un climatiseur mural à Outremont
Reading time: 4'

Maintenance of a wall-mounted air conditioner in Outremont

Preventive intervention to ensure clean air and optimal performance

At AirGreen , we emphasize the importance of regular maintenance of wall-mounted air conditioners , a service often overlooked by homeowners, but essential to the performance and durability of the system. On this day, our team visited a charming apartment in the Outremont neighborhood of Montreal for a complete cleaning of a wall-mounted air conditioner that was beginning to emit a weaker breeze and a slight smell of humidity.

The customer contacted us after noticing a visible buildup of dust on the blue filters of his indoor unit. He requested a complete professional service before the summer season.

Initial diagnosis: classic but significant fouling

As soon as the front panel was opened, the observation was clear:

  • The fine mesh filters were covered with a film of dust and pollen.

  • The heat exchanger fins showed a grayish deposit, a sign of prolonged lack of maintenance.

  • The condensate drain showed a slight beginning of obstruction.

Although the air conditioner seemed to be working properly, such fouling can cause:

  • A 10 to 20% drop in energy efficiency .

  • Poor indoor air quality .

  • Premature wear of the compressor .

AirGreen Maintenance Process

Our technicians carried out a complete deep cleaning according to the AirGreen protocol:

  1. Remove and wash the air filters with warm water and mild soap.

  2. Spraying a biodegradable antibacterial cleaner on the evaporator and fins to eliminate dust, spores and bacteria.

  3. Cleaning the condensate tray and the drain pipe to prevent any risk of water overflow.

  4. Thorough dusting of the rotating fan (turbine) to restore optimal airflow.

  5. Complete sanitation of internal surfaces using a professional residue-free disinfectant.

  6. Reassembly and functional testing of the system, with temperature and air flow measurement.

The unit was then tested for 20 minutes: the air flow was restored , and the blowing temperature reached its nominal level, a sign of optimal energy performance.

Results: restored efficiency and healthier air

After cleaning, the customer immediately noticed:

  • A more powerful blast of air .

  • Reduced noise during operation.

  • A fresh, neutral scent in the room.

This type of maintenance, carried out by a professional, guarantees a longer life for the air conditioner and reduced electricity consumption.

Why Regular Maintenance is Essential

Many people are unaware that a poorly maintained wall-mounted air conditioner quickly accumulates:

  • Dust, pollen and animal hair.

  • Bacteria and mold in air ducts.

  • Stagnant condensation promotes odors.

An annual interview allows you to:

  • Prevent electronic and mechanical breakdowns.

  • Maintain the manufacturer's warranty.

  • Optimize thermal performance.

  • Ensure healthier indoor air —especially important for children and people prone to allergies.

AirGreen Expertise in Montreal and Surrounding Areas

At AirGreen , we perform HVAC maintenance and repairs in Montreal, Laval, Longueuil, the North Shore, and the South Shore. Our certified technicians handle all types of systems: Fujitsu, LG, Midea, Sharp, Goodman, Tosot, Zephyr, Trane , and more.

Each intervention is documented and followed by a clear report indicating the general condition of the system, anomalies detected and future maintenance recommendations.

Maintenance tips for owners

To maintain the performance of your wall-mounted air conditioner between two professional visits:

  • Clean the filters every three to four weeks during the usage season.

  • Avoid smoking or burning candles near the unit—fine particles settle quickly.

  • Keep the ventilation grilles clear of any obstructions.

  • Schedule a professional maintenance every spring before the hot weather.

These simple actions can significantly reduce energy consumption and maintain consistent comfort.

AirGreen: Your Trusted HVAC Maintenance Partner

Thanks to a meticulous and respectful approach to each appliance, AirGreen has established itself as the benchmark for residential HVAC system maintenance and repair in Greater Montreal. We guarantee clean air, maximum performance, and peace of mind season after season.