When precision meets comfort: an AirGreen service call in Sainte-Julie
At AirGreen , we were recently called about a performance issue with an LG wall-mounted air conditioner in a Sainte-Julie residence on Montreal's South Shore. The customer noticed that their unit was no longer cooling as efficiently as before, even after cleaning the filter. Our mission: to diagnose the real cause and restore indoor comfort before the arrival of another heat wave.
Initial inspection and temperature check
Upon our arrival, our technician took a temperature reading using a professional infrared thermometer . The measurement showed 14.2°C at the air outlet, which is insufficient for a high-performance wall-mounted air conditioner in cooling mode.
The indoor unit, an LG ArtCool series model, displayed 17°C on its screen, indicating a performance gap.
Our first hypotheses:
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a lack of refrigerant (possible leak);
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a dirty exchanger ;
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a faulty temperature sensor ;
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or an internal fan running at low speed .
In-depth diagnosis and problem identification
After checking the refrigerant pressure outside, our tests confirmed a slight leak at the expansion valve connection . This type of problem, often invisible to the naked eye, manifests itself as a gradual loss of efficiency: the heat pump or air conditioner appears to be working, but is no longer able to reach the target temperature.
We also took advantage of the intervention to:
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clean the internal exchanger with a biodegradable solution;
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check that the fan motor is working properly;
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inspect the electronic sensors and control board.
System repair and upgrade
Once the leak was located, we carried out a complete repair of the connection , followed by a pressure leak test to ensure the durability of the fix. After recharging with the LG-compliant refrigerant gas, the discharge temperature dropped to 7.8°C —optimal performance for a unit of this type.
This result confirms not only the quality of the intervention, but also the precision of our diagnostic tools, essential to ensure fast and reliable HVAC repairs .
Result: restored comfort and optimal efficiency
At the end of the service, the customer immediately noticed the difference: the indoor temperature stabilized in less than 15 minutes. Thanks to our comprehensive maintenance, the LG wall-mounted air conditioner is now operating at full capacity, without excessive energy consumption or unusual noise.
At AirGreen, we always emphasize prevention : regular maintenance (cleaning filters, checking pressures and sensors) helps prevent most breakdowns and extend the life of any air conditioning system.
Why choose AirGreen for your HVAC needs in Sainte-Julie and elsewhere
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Certified technicians specializing in LG, Fujitsu, Gree, Sharp, Midea systems and more.
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Accurate diagnosis using professional tools (thermal cameras, digital pressure gauges, leak detectors).
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Fast and courteous service throughout the South Shore , as well as in Montreal , Laval and the North Shore .
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Parts and labor warranty for each intervention.
Whether it's a wall-mounted air conditioner repair , heat pump maintenance , or a complete installation of a new HVAC system , we always put the same rigor and passion into every service call.