A typical service call in a Laval residence
At AirGreen , we were contacted by a customer in Chomedey, Laval , whose Gree wall-mounted air conditioner was no longer effectively cooling his main living space, despite regular maintenance performed the previous year. The customer noticed a blast of warm air, accompanied by a slight metallic noise upon startup. Our team quickly scheduled a service call to make an accurate on-site diagnosis.
Diagnosis and assessment of the fault
Upon our arrival, our technicians conducted a complete inspection of the HVAC system . The Gree wall unit, installed in the living room near the open kitchen, had dust buildup on the evaporator and wear on the indoor fan motor .
The outdoor condenser , located on the aft balcony, was operating, but refrigerant pressures were significantly lower than normal , indicating a microleak in the refrigeration circuit .
Our measurements confirmed:
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Abnormally low static pressure (60 psi instead of the expected 120 psi for R410A).
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Intermittent interior ventilation, caused by a weakened motor.
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Slight oil accumulation at the condenser flare connection.
Intervention: complete repair of the refrigeration circuit
We started the repair of the Gree wall-mounted air conditioner in several structured steps:
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Complete recovery of refrigerant to comply with the environmental standards of the Régie du bâtiment du Québec (RBQ) .
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Replacement of the flare fitting and tightening of the copper coupler with suitable sealing paste.
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Leak test under nitrogen at 300 psi for 30 minutes — no pressure drop observed.
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Replacement of the indoor fan motor , original Gree part supplied by our Laval warehouse.
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Complete draining and recharging of the R410A system , calibrated according to the manufacturer's specifications.
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Complete cleaning of the evaporator and drain pan , including an antibacterial rinse and checking the condensate trap.
Result and improvement of comfort
After the repairs, the unit immediately returned to full efficiency:
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Blowing temperature: 8°C after 5 minutes of operation.
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Noise level reduced by 30%.
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Estimated reduction in electricity consumption of 12% according to our voltage and current measurements.
The client noticed a significant difference in comfort , especially in the open kitchen which previously had difficulty reaching 24°C. We also recommended an annual check in the spring to prevent dirt build-up in the heat exchanger and extend the life of the compressor.
AirGreen Expertise in Laval and Greater Montreal
At AirGreen , we work daily on wall-mounted air conditioners from Gree, Fujitsu, Midea, Sharp, Hitachi and other major brands throughout Greater Montreal, Laval, Longueuil, the North Shore and the South Shore .
Our RBQ-certified and CCQ-certified technicians apply strict diagnostic and safety protocols to every intervention.
We always favor repair before replacement , when it is economically viable and complies with energy performance standards.
Practical tips for owners of wall-mounted air conditioners
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Clean the filter every 3 to 4 weeks during the warm season.
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Avoid blocking airflow around the indoor unit.
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Have the refrigerant pressure checked every two years.
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Call a certified technician for any loss of performance or unusual noise.
With these simple steps, your wall-mounted air conditioner will maintain optimal performance and increase its longevity.
Conclusion
This Gree wall-mounted air conditioner repair in Chomedey perfectly illustrates the rigor of our approach at AirGreen: accurate diagnosis, rapid response, genuine parts, and transparent service. The result: a fully functional system, a satisfied customer, and reliable air conditioning for the Laval summers to come.
Caution: HVAC system repairs must always be performed by qualified technicians holding the appropriate licenses (RBQ, CCQ, CMMTQ).