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Réparation d’un climatiseur mural Gree à Saint-Lambert
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Gree wall-mounted air conditioner repair in Saint-Lambert

A meticulous intervention in a bright duplex on the South Shore

At AirGreen , we were recently called to Saint-Lambert , on the South Shore of Montreal , for a Gree wall-mounted air conditioner repair service in a charming renovated duplex. The owner contacted us after noticing that his system was no longer cooling properly, despite maintenance performed a few months ago. The indoor temperature remained high, even after several hours of operation.

Accurate diagnosis of the problem

Upon our arrival, we conducted a thorough inspection of the HVAC system . The wall-mounted air conditioner, a Gree Lomo 12,000 BTU model, was installed above a door connecting the dining room and living room—a convenient location for even air distribution. However, several warning signs alerted us:

  • The operating indicator light was flashing abnormally .

  • The indoor fan was spinning slowly .

  • No condensation was accumulating on the drain line.

After some electrical measurements and a check of the refrigerant pressures, our technician quickly confirmed the cause: a faulty control board , preventing communication between the indoor unit and the outdoor compressor. This type of failure is typical of wall-mounted units over 7 years old , especially after repeated electrical surge cycles or poor circuit protection.

Repair: rigor and precision

We undertook the repair in several carefully planned stages:

  1. Turn off the main power supply to ensure safety.

  2. Remove the front panel and control board , taking care to photograph the existing wiring.

  3. Install a new original Gree electronic card , compatible with the exact model.

  4. Check electrical and thermal connections to avoid any overvoltage or short circuits.

  5. Test communication between modules using a multimeter and the built-in diagnostic mode.

Once the part was replaced, the air conditioner restarted without difficulty. We let the system run for 20 minutes to validate the compressor stability and the air outlet temperature . Result: 8°C at the outlet - a performance in line with Gree factory standards.

Improving efficiency and customer advice

The owner, satisfied with the result, asked us for advice on how to extend the life of his wall-mounted air conditioner . We recommended:

  • Install a surge protector on the air conditioner's dedicated line.

  • Clean the filters every two months during the summer season.

  • To carry out annual professional maintenance , including checking the refrigerant gas and drainage.

  • Avoid keeping the temperature below 20°C for long periods, which can overload the compressor.

We also offered the addition of Gree+ Wi-Fi control to optimize energy management, a popular option with our South Shore customers.

AirGreen Expertise in Saint-Lambert and Beyond

Every HVAC repair intervention is an opportunity for us to demonstrate our technical know-how and our human approach . In Saint-Lambert , as elsewhere on the South Shore, in Laval and in Montreal , our certified technicians ensure that each Gree, Fujitsu, Midea or Sharp device regains its optimal performance.

Thanks to our comprehensive parts inventory and accurate on-site diagnostics , most repairs are completed in a single visit. This reduces time, costs, and, most importantly, customer discomfort.

Why Choose AirGreen for Your HVAC Repairs

Our interventions are based on three essential pillars:

  1. Transparency : clear diagnosis, simple explanation, detailed estimate before any repair.

  2. Efficiency : fast repairs with original parts and specialized tools.

  3. Satisfaction : complete post-intervention tests and personalized customer follow-up.

Whether you're in Montreal , Laval , Longueuil , or on the North/South Shore , AirGreen guarantees professional, courteous, and long-lasting service. Our technicians treat each unit as if it were their own—with care, precision, and respect for the occupants' comfort.

Conclusion
This Gree wall-mounted air conditioner repair in Saint-Lambert perfectly illustrates our commitment to providing superior service, focused on performance and peace of mind. By getting this system back up and running, we not only restored home comfort, but also extended the unit's lifespan for several years.