A meticulous intervention to bring a wall-mounted air conditioning system back to life
At AirGreen , we know that a broken wall-mounted air conditioner in the middle of summer can quickly become a major problem. Recently, our team was called to a stylish condo in Ville Mont-Royal to work on a Gree wall-mounted air conditioner that was no longer blowing cold air.
The context of the intervention
The customer had noticed a gradual decline in performance over the past few days: the unit was running, but the interior temperature remained warm, even at full power. An abnormal noise was also coming from the interior fan. The installation, installed about five years ago, had not received regular maintenance, which is often the cause of many problems encountered with wall-mounted HVAC units .
Our technician quickly went on site to carry out a complete diagnosis .
Initial diagnosis: several possible causes
When opening the front panel, several signs confirmed our initial hypotheses:
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Significant dust accumulation on the turbine and evaporator.
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Traces of moisture around the condensate drain, suggesting a possible blockage of the drain pipe .
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A slightly frosted evaporator coil , a sign of refrigerant pressure imbalance.
After checking the refrigeration circuit pressure, our measurements confirmed a low R-32 refrigerant charge , probably due to a micro-leak at the connection between the copper pipes and the indoor unit.
Steps of repair
Our team proceeded with rigor and method:
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Partial removal of the front cover and complete cleaning of the turbine.
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Checking the internal electrical wiring and tightening the terminals.
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Locating the leak using an electronic detector, precisely at the junction of the suction tube.
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Phosphorus brazing to eliminate the leak.
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Complete vacuuming of the circuit to ensure adequate dehumidification.
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Recharge with R-32 refrigerant according to the manufacturer's specifications.
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Performance test : measurement of evaporation and blowing temperatures to confirm the efficiency found.
Result: restored performance and a satisfied customer
After the repair, the Gree wall-mounted air conditioner regained its full cooling capacity. The unit operated quietly, and the room temperature quickly dropped to the desired level. The customer immediately noticed a marked difference in comfort and performance.
We also took advantage of the visit to perform a complete cleaning of the coil , as well as an antibacterial treatment in the condensate tray — an essential practice to prevent the proliferation of mold and ensure better indoor air quality.
AirGreen Preventive Tips
To avoid this type of failure in the future, we have recommended:
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Annual maintenance before the hot season, including cleaning filters and checking pressures.
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An inspection of the condensate drain to prevent overflow or excessive moisture.
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Checking refrigerant connections , especially on units installed in exterior walls exposed to temperature variations.
These regular maintenances not only extend the lifespan of the equipment, but also optimize its energy consumption.
AirGreen expertise at your service
Working on a Gree wall-mounted air conditioner requires extensive knowledge of modern residential HVAC systems. Our certified technicians are fully familiar with the internal structure of Gree, Fujitsu, Midea, and other popular brands in Montreal, Laval, Longueuil, and on the North and South Shores .
Thanks to our precise diagnostic tools and rigorous practices, we are able to detect and resolve breakdowns on the first visit , thus avoiding additional costs or prolonged service interruptions.
Trust built on transparency and rigor
At AirGreen, every repair is documented and clearly explained to the customer. In this case, we provided a comprehensive report including pre- and post-recharge pressures, measured temperatures, and a preventive maintenance recommendation. This transparency is at the heart of our approach: it ensures our customers understand exactly what was done and why.
Conclusion
This Gree wall-mounted air conditioner repair in Ville Mont-Royal perfectly illustrates our philosophy: combining technical expertise, rigor, and quality customer service. The unit has regained optimal efficiency while reducing energy consumption.
Whether it's for a refrigerant leak , a noisy fan , an electronic card failure or complete maintenance , our team remains available to intervene quickly anywhere in Greater Montreal.