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

A service call in the middle of a summer heatwave

On a hot July day, a Brossard resident contacted us after noticing a drop in performance from his Gree wall-mounted air conditioner . The unit, renowned for its reliability and energy efficiency, was blowing lukewarm air even in maximum cooling mode. At AirGreen , we know how quickly such an inconvenience can turn a comfortable interior into a veritable furnace. So, we dispatched a certified technician to the site for an immediate and complete diagnosis .

Initial inspection and first measurements

Upon arrival, our technician used a professional infrared thermometer to measure the air temperature blown by the indoor unit. The reading was 13.1°C , an acceptable but abnormally high value for an air conditioner under full load—a potential sign of partial efficiency .

Visual analysis revealed a Gree wall-mounted unit in good general condition, with no apparent signs of leakage or excessive condensation. The customer confirmed that a service had been carried out more than two years ago, which immediately pointed our attention to fouling of the internal components .

Step 1 – Complete Gree System Diagnostics

Our HVAC diagnostic protocols are based on a methodical approach:

  1. Checked the air filters : completely clogged with fine dust, which restricted the incoming airflow.

  2. Evaporator coil inspection : dirt buildup, reducing heat exchange.

  3. Refrigeration pressure measurement : slight underpressure detected, sign of a lack of R-410A refrigerant .

  4. Electrical check : main capacitor and control board in perfect condition.

Each element of the diagnosis confirmed a combination of factors —lack of maintenance and partial loss of refrigerant—as the cause of the reduced performance.

Step 2 – Cleaning and Restoration

Before any refill, we carried out a deep cleaning :

  • Remove and thoroughly wash the air filters with warm soapy water.

  • Applying a specialized biodegradable cleaner to the inner coil to dissolve greasy deposits.

  • Thorough rinsing and drying under gentle pressure to avoid damage to the fins.

  • Suction of the condensate drain , thus preventing any risk of backflow or mold.

Once the interior was clean and dry, we were able to continue repressurizing the system.

Step 3 – Refrigerant Recharge and Calibration

After pulling a complete vacuum on the refrigeration circuit for 45 minutes, we added the exact amount of R-410A refrigerant prescribed by the manufacturer, Gree. The pressures immediately stabilized, and the discharge temperature dropped to 8.9°C —an improvement of more than 4 degrees over the initial measurement.

We then carried out:

  • An extended 30-minute performance test , confirming a stable cooling cycle.

  • A check of the condensation drain to ensure smooth drainage.

  • A calibration of the ambient sensor to ensure precise temperature regulation.

Result: restored comfort and a satisfied customer

At the end of the intervention, the difference was immediate: the client felt a rapid drop in room temperature and a return to comfort throughout the room. The Gree unit was once again operating at full capacity, with a constant and quiet flow of fresh air.

This type of breakdown, which is common when there is a lack of regular maintenance , illustrates the importance of annual preventive cleaning and pressure checks before the summer season. At AirGreen, we make it a point of honor to offer a transparent, professional and sustainable service, which guarantees the performance and longevity of HVAC units.

AirGreen maintenance tips

To avoid a similar situation, we recommend that owners of Gree wall-mounted air conditioners—and any other brand—follow these best practices :

  • Clean filters every 4 to 6 weeks during the summer.

  • Schedule a complete professional maintenance before each warm season.

  • Avoid blocking the indoor unit with furniture or curtains.

  • Check the condition of the drain and fins at each change of season.

These simple actions help reduce energy consumption and extend the life of the air conditioner.

AirGreen: your HVAC reference in Greater Montreal

Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our team of qualified technicians is ready to intervene quickly to repair, maintain or install any type of residential or commercial HVAC system .

Each AirGreen intervention is based on three pillars:

  • Proven technical expertise .

  • Complete transparency on diagnoses and costs.

  • Human and professional customer service .