An accurate diagnosis for restored comfort
At AirGreen , every service call begins with attentive customer service and a rigorous technical analysis. This intervention in Saint-Lambert , on the South Shore of Montreal , is a perfect example: a Gree wall-mounted heat pump that was no longer cooling properly despite a normal display on the remote control and a running outdoor compressor.
The context of the intervention
Our client, living in a modern condo in downtown Saint-Lambert , noticed that the air blown by her heat pump was lukewarm, even after several restarts. No error code appeared on the screen, but the room temperature no longer dropped below 25°C , despite a setpoint of 18°C .
Upon arrival, we immediately performed a complete system check : indoor unit, outdoor condenser, electronic communication and blower temperatures.
Technical diagnosis: a typical case of loss of performance
Equipped with a professional infrared thermometer , our technicians measured the air temperature at the outlet of the indoor unit: 20.6°C , well above the normal expected values (between 8°C and 12°C in air conditioning mode).
We then checked:
-
The actual operating mode (air conditioning and not dehumidification).
-
Cleanliness of the filter and exchanger : no major obstructions.
-
Airflow : Functional blower motor.
-
R-32 refrigerant pressure : lower than normal, indicating a microleak in the refrigeration circuit .
The origin of the problem
Using an electronic leak detector and a soap solution on the flare fittings , we located the leak on a pipe connection near the condenser outlet . Over time and vibration, a slight loosening had occurred, allowing a small amount of gas to escape.
The steps of repair
-
Recovery of residual refrigerant to avoid any emissions into the air, in accordance with environmental standards.
-
Disassembly and tightening of flare fittings , with replacement of copper sealing rings.
-
Complete vacuum (500 microns) to remove all moisture.
-
R-32 gas refill to the exact specifications of the Gree model .
-
Electronic verification of the compressor and control board to ensure optimal operation.
-
Final test of temperatures and pressures after restart.
Immediate result
After recharging, the measured discharge temperature at the indoor unit outlet dropped to 10.8°C —evidence of restored performance. In less than 20 minutes, the room had already gained more than 4°C in comfort .
Our customer immediately felt the difference: fresh, stable and quiet air, exactly as it was when the installation was originally installed.
Our tips to avoid a similar breakdown
At AirGreen, we believe that prevention is the key to sustainable performance . We therefore recommended to the client:
-
An annual check of the pressure and tightness of the circuit.
-
A complete cleaning of the internal filter every month during the warm season.
-
A professional inspection every two years of the compressor and refrigeration connections.
AirGreen expertise: speed, rigor and transparency
This type of failure—slow leak and loss of refrigerant gas charge—is common on Gree, Fujitsu, or Sharp wall-mounted systems installed for more than three years. The difference lies in the speed of intervention and the accuracy of the diagnosis .
Our technicians are trained to identify the hidden causes of poor performance using cutting-edge tools and rigorous methodology. We always offer:
-
A complete diagnosis before any recharge ;
-
Original components for all repairs;
-
A clear technical report after each visit, including pressures, temperatures and recommendations.
AirGreen: your HVAC partner on the South Shore and in Montreal
This repair in Saint-Lambert illustrates our commitment: to offer fast, reliable and professional HVAC repair service throughout Montreal, Laval, Longueuil, the North Shore and the South Shore .
Whether it's a faulty compressor, a leak, a faulty electronic board, or a performance issue, our team of AirGreen experts responds efficiently and transparently.
We are proud to help our customers regain optimal comfort , while extending the life of their heat pump — an ecological and economical solution for Quebec homes.