When urban heat meets Gree performance: a typical Montreal service call
At AirGreen , we are often called upon to intervene in red brick buildings characteristic of the Rosemont–La Petite-Patrie neighborhood. This call concerned a Gree wall-mounted air conditioner whose outdoor unit, securely mounted on a side wall, had not been working properly since the beginning of spring. The client, an apartment building owner, contacted us after noticing that the air blown inside was no longer cold and that an unusual noise was coming from the compressor .
Diagnosis: Intermittent failure of the outdoor fan
Our technician quickly arrived on site for a complete diagnosis of the HVAC system . The model in question—a Gree 12,000 BTU using R-32 refrigerant —showed clear signs of poor heat dissipation . By carefully observing the unit's operation, we noticed that the outdoor fan was sporadically stopping, causing pressure to build up in the refrigeration circuit and thus a compressor shutdown.
The inspection revealed:
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a damaged fan control board ;
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a tired starting capacitor ;
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and slight fouling of the condenser battery , amplifying overheating.
Repair: replacement and calibration for optimal performance
Our technicians first thoroughly cleaned the condenser coil using a biodegradable product designed specifically for Gree units. The capacitor and fan circuit board were then replaced with certified genuine parts. Once installed, we calibrated the fan speed and performed a refrigeration pressure test to confirm the system's tightness and proper performance.
Thanks to this intervention, the flow of outside air has become constant again, ensuring good heat evacuation and rapid cooling inside the homes.
Result: comfort restored and efficiency regained
At the end of the service, the customer noticed a significant decrease in cooling time and a reduction in mechanical noise . The Gree wall-mounted air conditioner resumed smooth, quiet, and stable operation, providing immediate comfort to the occupants. We also advised the customer to perform a complete annual service before each summer to avoid condenser fouling and recurring electronic problems.
Why Gree wall units remain an excellent choice in Montreal
Gree wall systems , very popular in Montreal and on the North and South Shores , are renowned for their robustness and compatibility with Quebec's harsh winters. However, like any electronic device, they require periodic inspection to maintain their performance.
Our recommendations:
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Clean the internal filters every two months during the warm season.
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Avoid obstructions around the outdoor unit to allow adequate ventilation.
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Schedule preventative maintenance with an AirGreen certified professional at least once a year.
AirGreen expertise: precise and sustainable interventions
This repair perfectly illustrates our philosophy: every HVAC problem is unique and deserves a personalized approach. At AirGreen , we combine technical expertise , rigorous diagnostics , and transparency to ensure the long-term reliability of the systems we maintain.
Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our team responds quickly to restore your HVAC equipment to perfect condition — whether it is heat pumps , wall-mounted air conditioners or central systems .
AirGreen – Your HVAC expert in Montreal and surrounding areas.
Performance, reliability and comfort… season after season.