Fast service for optimal cooling restored
At AirGreen , we recently repaired a Gree wall-mounted air conditioner in an apartment in the Côte-des-Neiges area of Montreal. The customer called us after noticing that their unit was blowing lukewarm air despite the temperature being set to the lowest setting. This type of problem is common at the beginning of the season, especially when the system hasn't been used for several months.
The diagnosis: a loss of performance measured to the nearest degree
Upon our arrival, our technician took out his professional infrared thermometer to measure the blowing temperature. Result: the air was coming out at 17.4 °C , while a well-calibrated wall-mounted air conditioner should provide a flow between 7 and 12 °C depending on the ambient conditions. This reading immediately confirmed an anomaly in the refrigeration cycle .
We then carried out a complete inspection:
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Checking refrigerant pressures on the outdoor compressor.
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Check the cleaning of the indoor coil and the condition of the filter.
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Compressor current analysis to detect under-efficiency.
The verdict: a slight leak of R-32 refrigerant at the suction line connection. This type of microleak, almost invisible to the naked eye, results in a gradual decline in performance without a complete system shutdown.
The intervention: detection, welding and recharging
Our team conducted a tracer gas leak detection and confirmed the affected area. After securing the workstation, we:
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Cleaned and brazed the copper fitting using a silver alloy.
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Nitrogen leak tested to ensure repair.
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Proceed to recharge the system with the exact amount of R-32 refrigerant , respecting the specifications of the Gree manufacturer.
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Restarted the system for final check of blowing pressures and temperature.
The temperature measured after repair was 10.2°C , which is perfect performance for this type of installation.
Result: restored comfort and optimized energy efficiency
The customer immediately noticed an improvement in freshness and airflow. His Gree wall-mounted air conditioner was back to its original performance, with no unusual noises or vibrations. We took the time to explain good maintenance practices:
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Clean the filters every two weeks during the summer.
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Annual visual inspection of the refrigerant line.
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Avoid covering the outdoor unit, even in winter, to prevent internal condensation.
AirGreen expertise in Montreal and Greater Montreal
Every AirGreen intervention is based on a rigorous method and precision measurement technology . Our certified technicians work in Montreal, Laval, Longueuil, on the North Shore and the South Shore for all types of wall-mounted systems—whether Gree, Fujitsu, Midea, Sharp, or Daikin.
We provide:
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Accurate and transparent diagnoses , with supporting measurements.
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Fast repairs , often in one visit.
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Real performance tests , ensuring optimal performance.
Why choose AirGreen for your wall-mounted air conditioner repairs?
Because we combine technical expertise , a local approach , and impeccable customer service . Every repair is documented, measured, and validated before we leave. This attention to detail makes AirGreen a benchmark in residential HVAC repair in Montreal.
This project in Côte-des-Neiges is a concrete example: a quick diagnosis, a leak efficiently repaired and an air conditioner ready for summer.