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Réparation d’un climatiseur mural Gree au Plateau-Mont-Royal
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Repair of a Gree wall-mounted air conditioner in Plateau-Mont-Royal

A service call in an old apartment in the Plateau

In the historic Plateau-Mont-Royal district, we were called to repair a Gree wall-mounted air conditioner installed in a narrow hallway of a typical Montreal apartment. The customer had noticed a water leak along the wall for a few days, accompanied by an irregular noise each time the unit started . This type of situation is common in older buildings where drainage pipes and insulation can be compromised by time.

Diagnosis: a drainage and thermal insulation problem

Upon arriving on site, our technicians immediately noticed that the Gree wall-mounted air conditioner , mounted high above the door frame, had traces of moisture on the adjacent partition. Upon opening the front panel, they discovered:

  1. A condensation tray partially clogged with debris and dust, preventing water from draining properly.

  2. A kinked drain hose at the unit outlet, causing condensate to back up.

  3. Partially deteriorated pipe insulation , resulting in external condensation on the refrigeration duct.

These three elements explained the leak and the dripping noise heard by the customer.

Intervention: a complete and lasting repair

At AirGreen, every repair is carried out with rigor and method. Here are the steps of our intervention:

  • Disassembly of the front panel and complete cleaning of the condensation tray with hot water and neutral disinfectant.

  • Straightening and securing the drain pipe with heavy-duty clips to ensure a constant outward slope.

  • Replacement of the refrigeration line insulation with new high-density foam sheathing, sealed at each joint to prevent future condensation.

  • Drainage test with clear water to confirm free flow.

  • Cleaning the filter and checking the temperature sensor to ensure optimal service recovery.

Result: comfort restored and interior protected

After restarting the air conditioner, the flow was smooth and quiet. Residual moisture on the wall was dried using a dehumidifier, and no new leaks were detected. The customer immediately noticed improved cooling efficiency and a noticeable reduction in noise during startup.

We also took the time to recommend annual preventative maintenance , especially for wall-mounted air conditioners located in tight spaces like hallways, where dust and heat build up more quickly.

Why trust AirGreen for your HVAC repairs in Montreal

The buildings of the Plateau-Mont-Royal , with their old structures and thick walls, often present particular challenges for HVAC systems. The AirGreen team is trained to work in this type of environment, with adapted tools and in-depth expertise in residential air conditioning .

We repair and maintain all major brands of wall-mounted air conditioners and heat pumps: Gree, Midea, Fujitsu, Sharp, Goodman, Lennox, Bosch, Trane , and many others. Our services cover the entire Greater Montreal area, from Laval to the North Shore and the South Shore .

Maintenance tips to extend the life of your wall-mounted air conditioner

  1. Clean the filters every 2 to 3 months , especially during the summer season.

  2. Watch for signs of condensation around the unit.

  3. Ensure the drain hose remains clear and has no kinks or obstructions.

  4. Call an AirGreen professional every year for complete and safe maintenance.

A simple preventive check can prevent water infiltration, electronic card failures, or costly repairs.

AirGreen: your HVAC expert serving Montreal comfort

Thanks to our local know-how and our commitment to quality, AirGreen has become a trusted player for the repair, maintenance and installation of HVAC systems in Montreal, Laval, Longueuil , and throughout the North Shore and the South Shore . Each intervention is carried out with care, respecting your space and your comfort.