A typical service call in a residential area of Laval
One beautiful summer afternoon in Sainte-Rose , our AirGreen technicians were called by a customer who noticed that her Midea wall-mounted air conditioner was no longer blowing cold air. The outdoor unit, securely mounted to the brick wall of her home, appeared to be working, but the indoor temperature continued to rise. This is a common situation during the mid-season, when temperature fluctuations and humidity can quickly put heating, ventilation, and air conditioning (HVAC) systems to the test.
Initial diagnosis: a progressive loss of performance
Upon our arrival, we carried out a complete diagnosis of the Midea system , a compact single-zone model, typical of residential wall-mounted installations. The customer had noticed a gradual decrease in the flow of cold air over the past several days, accompanied by a slight noise when the compressor started.
Our technicians quickly inspected:
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The pressure of R-32 refrigerant , slightly below normal values;
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The condition of the external fan , whose blades were partially obstructed by dust and debris;
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The internal filter , saturated after several months of use without cleaning;
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Electrical connections and starting capacitor all in good condition.
The origin of the problem: a slow leak on the flare connection of the refrigeration circuit , causing a progressive loss of refrigerant and therefore reduced efficiency.
Technical intervention: rigor and precision
At AirGreen, we prioritize durable repairs that comply with Quebec's HVAC standards. After locating the leak using an electronic detector, we:
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Recovered residual refrigerant to avoid any emissions into the atmosphere;
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Redo the crimping of the flare fitting , applying the tightening torque recommended by Midea;
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Performed a nitrogen leak test to confirm no leaks;
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Recharged the system with R-32 , calibrated according to the nameplate;
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Cleaned the outdoor condenser and indoor filters ;
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Performed a full performance test , including blowing temperature, airflow and static pressure.
Result: the device regained its nominal efficiency , blowing at 8°C in air conditioning mode.
A reassured customer and a system ready for summer
Once the repair was complete, we took the time to explain good maintenance practices to the customer:
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Clean filters every four to six weeks;
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Avoid obstructing the front of the outdoor unit;
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Schedule an annual preventive inspection , especially before the summer season.
These simple actions help preserve energy performance and extend the life of your heat pump or wall-mounted air conditioner.
Why trust AirGreen for your HVAC repairs in Laval?
In Sainte-Rose as in all of Laval , AirGreen stands out for:
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Certified and trained technicians on the most popular brands (Midea, Gree, Fujitsu, Sharp, Daikin, etc.);
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Fast and transparent service , with no hidden costs;
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Genuine parts and guaranteed repairs;
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Extended availability across Greater Montreal, including the North Shore and the South Shore .
Our teams are fully familiar with local climate conditions: humid heat, harsh winters, and rapid temperature fluctuations. This is why we tailor each intervention to the client's specific environment.
A simple repair, comfort restored
At the end of our visit, the customer found optimal comfort in her home, without unusual noise or loss of performance. The Midea wall-mounted air conditioner, now recharged and tested, was ready to face the upcoming heatwaves.
This intervention illustrates our philosophy well: to intervene with precision, offer a human service and guarantee peace of mind to each client.
At AirGreen , every service call is an opportunity to demonstrate our HVAC expertise , technical rigor and commitment to customer satisfaction .