A kitchen intervention in the heart of the South Bank
A homeowner in Sainte-Julie , on Montreal's South Shore, contacted us after noticing that his Gree wall-mounted air conditioner in his kitchen was no longer blowing cold air. The unit, installed above the cabinets, was apparently working (indicator light on, fan active), but the room temperature was not decreasing despite several restarts.
In a room like the kitchen—where heat sources are constant—a reliable HVAC system is essential. At AirGreen , we understand how crucial air conditioning is to maintaining stable comfort during Quebec summer days.
Diagnosis: loss of efficiency and abnormal refrigeration pressure
Upon our arrival, our technician performed a series of standard tests:
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checking the supply voltage,
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condensate drain inspection,
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and measurement of the refrigerant circuit pressure.
The pressure readings were abnormally low, indicating a slow refrigerant leak in the circuit. Using an electronic detector, the leak was located at a flare connection on the outdoor condenser , a point often sensitive after several thermal cycles.
Repair steps: AirGreen rigor and precision
1. Draining and repairing the circuit
We carried out a complete recovery of the R410A refrigerant , in accordance with environmental standards. Then, the flare fitting was remanufactured with a new nut and a calibrated tightening torque application to ensure a perfect seal.
2. Pressurization and leak test
Nitrogen pressurization to 350 psi confirmed the absence of any residual leaks. The system was then left under monitoring for 20 minutes, with no pressure drop detected.
3. Vacuuming and refrigerant recharge
Once the test was validated, the circuit was evacuated to 500 microns, then recharged to the exact weight recommended by the manufacturer Gree . We adjusted the charge until optimal superheat and subcooling values were obtained.
4. Operational Check and Calibration
After restarting, the unit reached an indoor blowing temperature of 11.5°C , which is perfect performance for this Gree wall-mounted model. The unit then operated continuously for 30 minutes without any anomalies.
Result: restored comfort and efficiency
The customer immediately noticed a return of consistent freshness to his kitchen. The wall-mounted air conditioner, now perfectly sealed, ensures constant air distribution without temperature fluctuations.
We took advantage of the intervention to install a discreet wall protector to guide condensation and protect the surrounding paint.
AirGreen Tips to Extend the Life of a Wall-Mounted Air Conditioner
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Complete annual maintenance : coil cleaning and inspection of the refrigeration circuit allow leaks to be detected early.
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Check clearance around the indoor unit : avoid cabinets or objects blocking air circulation.
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Performance monitoring : A noticeable drop in cold is often the first sign of a lack of refrigerant.
At AirGreen , we emphasize the importance of prevention . An annual check-up by a certified technician is the key to avoiding efficiency losses and costly repairs.
AirGreen Expertise: Precision, Compliance and Local Service
Each intervention that we carry out in Sainte-Julie , Montreal , Laval , Longueuil , North Shore and South Shore is carried out according to RBQ and CSA standards.
Our specialized Gree, Sharp, Fujitsu and Midea technicians operate with the most modern diagnostic tools , guaranteeing fast, transparent and long-lasting service.
Our customers appreciate our approach focused on technical quality and durability : each AirGreen repair aims to restore the original performance of your HVAC system, while minimizing energy consumption.
Warning:
Any handling of refrigerant fluid must be carried out by a technician holding a valid refrigeration certificate issued by the Régie du bâtiment du Québec (RBQ) .
The non-professional use of pressure equipment presents a significant risk to the safety and compliance of the installation.