A service call to a charming brick house in Outremont
On a mild early summer morning, our AirGreen team was called to a typical residence in Outremont , an area known for its magnificent red brick homes and leafy streets. The client contacted us about an LG wall-mounted air conditioner installed on the upper floor of his house, which had stopped blowing cold air for a few days.
At this time of year, when the first heat waves are settling into Montreal, it's crucial that HVAC systems are fully operational. Our team's quick and methodical response allowed us to diagnose the exact cause of the problem and get the unit back up and running without delay.
Accurate diagnosis of an LG wall-mounted air conditioner
During our initial inspection, we noticed that the LG outdoor unit, mounted on the rear facade wall, was not starting up properly. There was no compressor or fan noise. This type of symptom often indicates:
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an internal electrical failure (faulty electronic card),
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a communication problem between the indoor and outdoor unit,
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or irregular power supply due to an unstable circuit breaker or damaged cable.
We started by checking the power supply: 240 volts were present. Next, we checked the main board of the LG outdoor unit – a Smart Inverter model, typical of modern residential ranges. After a few tests, we identified a damaged power board , responsible for the interruption of the compressor control.
On-site repair and recommissioning
At AirGreen, we always prioritize immediate repairs whenever possible. So, we removed the faulty circuit board, cleaned the connectors, and installed a new, genuine LG circuit board brought to us by our technician. Once the part was replaced, we performed a complete test:
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compressor restart ,
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refrigeration cycle check ,
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R-410A refrigerant pressure measurement ,
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and indoor blowing temperature control .
In less than an hour, the wall-mounted air conditioner was once again blowing cool, steady air at 16°C. Customer satisfaction was immediate, especially after several days without air conditioning.
Essential preventive maintenance
During our visit, we took the opportunity to recommend a complete HVAC system maintenance . Although the fault was caused by an electronic board, regular cleaning and annual inspection can often prevent other problems, such as:
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dust accumulation on the coils ,
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condensate obstructions ,
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icing of the evaporators ,
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or pressure fluctuations caused by a lack of refrigerant.
We cleaned the outdoor condenser, checked the indoor airflow, and adjusted the wall mounts to ensure the unit was perfectly stable.
AirGreen Expertise in Outremont and throughout Montreal
Outremont homes, often older but carefully renovated, present particular challenges when it comes to HVAC repairs :
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thick brick walls,
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limited access to electrical circuits,
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restricted conduits for wall installations.
Our team is trained to intervene effectively in these residential contexts, respecting the aesthetics of the building while ensuring optimal system performance .
We finished the intervention by testing the operation at different speeds and temperatures, confirming that the LG unit responded perfectly to the remote control commands.
Professional advice from AirGreen
Before leaving the premises, our technician shared some simple recommendations with the customer:
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Clean the indoor unit filters every month during the summer season.
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Avoid turning off the power supply during winter, as this can affect the memory of internal circuits.
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Schedule annual preventative maintenance , ideally in the spring, to ensure everything is ready before the warm season.
Thanks to this proactive approach, the customer will be able to enjoy their LG wall-mounted air conditioner for many years without interruption in comfort.
Reliable and fast service in the greater Montreal area
At AirGreen, we pride ourselves on providing fast, durable, and transparent HVAC repairs . Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team is ready to intervene to resolve any breakdown related to:
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wall-mounted air conditioners from LG, Fujitsu, Sharp, Gree, Midea, Daikin , etc.,
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heat pumps or multi-zone systems ,
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electric furnaces or central systems .
Each AirGreen intervention is distinguished by a rigorous diagnosis , guaranteed original parts , and personalized customer follow-up after the repair.
We are proud to contribute to the daily comfort of Montreal families by bringing their HVAC systems back to life, regardless of the brand or type of installation.