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Réparation d’un climatiseur mural LG à Ville-Marie
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LG wall-mounted air conditioner repair in Ville-Marie

A quick service call in the heart of downtown

At AirGreen , we were recently called to a modern condo in Montreal's Ville-Marie district for an urgent repair on an LG wall-mounted air conditioner . The customer, visibly upset by a sudden loss of cooling , had noticed that his unit was blowing lukewarm air despite being set to 20°C. With hot days ahead, action was needed quickly.

Diagnosis of the problem

Upon our arrival, our technician immediately conducted a complete inspection of the HVAC system . The indoor unit, installed above the sofa in the living room with its exposed concrete ceiling, showed no outward signs of damage. However, several clues pointed to our diagnosis:

  • The operation indicator light was flashing in error sequence.

  • The outdoor unit would not start.

  • A slight hissing sound could be heard from the expansion valve.

After checking the refrigeration circuit pressures, we found a minor leak of R-410A refrigerant at a flare fitting in the liquid line. This loss caused a drop in suction pressure , significantly reducing the cooling capacity.

Repair Steps

  1. Leak Isolation : The technician cleaned and tested the line using an electronic detector to confirm the affected area.

  2. Reconnection : The flare was redone and tightened to the torque recommended by LG.

  3. Complete vacuuming of the system to eliminate all traces of moisture.

  4. Recharge with R-410A refrigerant according to the manufacturer's exact specifications.

  5. Restart and performance tests : Pressure balanced, blowing at 11°C in cooling mode.

The entire process took approximately 90 minutes , demonstrating an efficient and precise intervention.

Results and customer satisfaction

Once the system stabilized, the customer immediately felt the difference: a cool, even blowing throughout the room. The room temperature returned to 22°C in less than 15 minutes.

Our technician then checked the condensate drainage , which is often problematic in wall-mounted condo installations, and cleaned the clogged air filter . These small preventative measures help ensure consistent performance and reduce energy consumption.

What this intervention reminds us

LG wall units are renowned for their reliability and efficiency , but like any HVAC unit, they require regular maintenance . Even a small refrigerant leak can cause:

  • a drop in performance,

  • compressor overload,

  • excessive electricity consumption,

  • and, ultimately, a more costly breakdown.

At AirGreen, we recommend an annual inspection including:

  • cleaning the coils,

  • checking pressures and refrigerant charge,

  • drainage validation,

  • and calibration of the remote control and modes.

AirGreen expertise serving Montrealers

This service in Ville-Marie perfectly illustrates our expertise: responding quickly, diagnosing accurately, and restoring comfort without compromise. Whether in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our certified technicians know every brand— LG, Gree, Sharp, Fujitsu, Midea , and many others.

Thanks to our electronic diagnostic tools and our field experience, we can identify the most subtle breakdowns before they become critical.

Tips to Extend the Life of a Wall-Mounted Air Conditioner

  • Clean the filters every 4 to 6 weeks during the warm season.

  • Make sure nothing is obstructing the blower flaps .

  • Avoid setting the thermostat too low: a setting between 22 and 24°C is ideal.

  • Call an AirGreen professional at the first sign of performance loss.

With these simple steps, you will not only optimize your comfort, but also the durability of your LG air conditioner .

In conclusion

This LG wall-mounted air conditioner repair in Ville-Marie once again demonstrates the importance of thorough diagnosis and preventative maintenance . At AirGreen, every service call is an opportunity to demonstrate our commitment to quality, transparency, and customer satisfaction .

If you notice that your air conditioner is no longer cooling as well as it used to, don't delay: prompt maintenance can prevent a major breakdown . Contact our team today for professional service anywhere in Greater Montreal.