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Réparation d’un climatiseur mural LG à Pointe-Claire
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LG wall-mounted air conditioner repair in Pointe-Claire

A service call in the heat of the moment: when precision makes all the difference

At AirGreen , we receive numerous calls each summer about wall-mounted air conditioners that no longer cool as well as they used to. In this specific case, a resident of Pointe-Claire , on the West Island of Montreal , contacted us after noticing that his LG wall-mounted heat pump was blowing lukewarm air despite a normal display on the remote control. Our team was dispatched quickly to diagnose and resolve the problem.

First observation: a constant airflow but without cooling

Upon arrival, the system was operating without any abnormal noise, but the temperature measured at the outlet of the indoor unit reached 24.9°C , well above normal values. We immediately undertook a complete diagnosis to determine the cause of the loss of performance.

The first steps of our inspection included:

  • Checking the air filter , slightly clogged with dust.

  • Blowing temperature analysis using an infrared thermometer.

  • Observation of the outdoor condenser , whose fan was working correctly.

These elements pointed us towards a refrigeration problem , often caused by an R-410A gas leak or a lack of charge .

In-depth diagnosis: pressure test and leak detection

To confirm our hypothesis, our technician Samuel conducted a pressure test with a digital manifold . The pressures observed were significantly lower than the norm for this type of LG unit, confirming a partial loss of refrigerant.

To locate the leak:

  • A nitrogen test was performed at 350 psi.

  • A microleak was detected at the flair connection of the indoor coil .

  • No traces of oil were visible, but the bubble test confirmed a slow loss.

This type of leak is common on older systems or systems that were improperly connected during initial installation. Fortunately, access to the connection was easy, allowing for a quick and lasting repair .

LG wall-mounted heat pump repair and recommissioning

Our technicians carried out the following steps:

  1. Safe recovery of gas remaining in the refrigeration circuit.

  2. Remanufacturing the flair with a calibrated die and application of a sealing paste specific to HVAC fittings.

  3. Nitrogen pressure test for 30 minutes , no loss detected.

  4. Vacuum drawn to 500 microns to remove all moisture.

  5. Recharge the system with R-410A according to LG label specifications.

Once the operation was completed, the system was restarted and the blowing temperature measured at 7.4°C — a return to optimal performance.

Results obtained: restored efficiency and instant comfort

After repair:

  • The cold air circulated steadily and evenly.

  • System pressures were within recommended values.

  • The compressor operated without overheating.

  • The temperature difference between the air inlet and outlet reached more than 16°C , a sign of impeccable performance.

The customer, impressed by the accuracy of the diagnosis and the speed of the intervention, chose to subscribe to our annual AirGreen maintenance program , in order to avoid any future problems.

Why LG wall-mounted air conditioners require regular attention

LG Inverter units are efficient, but their performance depends on constant maintenance. A small refrigerant leak or a clogged filter can quickly compromise their energy efficiency. At AirGreen , we recommend:

  • A complete cleaning of the indoor and outdoor coils once a year.

  • A check of refrigerant pressures and levels at the start of each hot season.

  • Dusting the filters every 4 to 6 weeks.

These simple actions ensure the longevity of the compressor and the stability of interior comfort.

The AirGreen commitment in Pointe-Claire and throughout Greater Montreal

This intervention in Pointe-Claire is just one example of the hundreds of calls we receive each year in the metropolitan area. Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our team is known for:

  • Its RBQ certified technical expertise .

  • Its fast and transparent service .

  • The use of professional diagnostic tools .

  • An approach focused on satisfaction and sustainability .

We believe that every repair is an opportunity to optimize the performance of your HVAC system and ensure your peace of mind.

Conclusion

Thanks to a rigorous approach and precise measurement technology, AirGreen enabled the Pointe-Claire client to regain immediate comfort and optimal energy performance.
This LG wall-mounted air conditioner repair illustrates our expertise and our commitment to providing superior quality service , based on competence, reliability and proximity.