A frozen breath found: our expert intervention at a client's home in Côte-des-Neiges
At AirGreen , our HVAC repair technicians work daily across Greater Montreal to restore equipment that is showing signs of weakness. This service call took us to an apartment in Côte-des-Neiges–Notre-Dame-de-Grâce , where a customer was complaining about a Midea wall-mounted air conditioner that was no longer cooling effectively, despite its normal operating noise.
Diagnosis: air temperature insufficiently cold despite an active compressor
Upon our arrival, our technician began by measuring the air outlet temperature using a professional infrared thermometer . The device displayed 13°C , whereas, for a system in good condition, the temperature should drop between 6°C and 8°C .
This first measurement indicated a loss of thermal performance : the compressor appeared to be working, but the system was unable to transfer heat efficiently.
Steps of in-depth diagnosis
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Complete visual inspection of the indoor unit :
The filter was slightly dirty, but nothing abnormal to explain such a loss of performance. -
Fan and Coil Check :
The evaporator had a thin layer of dust, but no frost or apparent leaks. -
Measurement of refrigeration circuit pressures :
When connecting the pressure gauges, we noticed a lower than normal pressure , a classic symptom of a lack of refrigerant . -
Leak detection :
Using an electronic detector, a small leak was detected on the solder of the external side connection , probably due to a micro-crack caused by thermal expansion cycles.
Refrigerant repair and recharge
Once the leak was located, our technician:
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Cleaned and re-torched with precision to seal the connection;
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Pulled a complete vacuum from the system to remove all traces of moisture;
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Recharged the circuit with R-410A refrigerant , respecting the nominal charge recommended by Midea;
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Tested the system to confirm pressure stability and return of optimal blowing temperature.
The infrared thermometer then displayed 7.2°C at the air outlet —a perfect result, proof that the system was regaining its full cooling capacity.
Result: comfort restored and efficiency restored
A few minutes after the repair, the customer already noticed a clear difference:
“The air is cold again and the room cools down much faster than before!”
In addition to restoring operation, we took the time to explain to the customer the warning signs of a leak :
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Gradual decline in performance,
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No condensation on the fins,
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Compressor that operates continuously,
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Warm air even at full power.
We also recommended annual maintenance to prevent refrigerant loss and maximize the life of your air conditioner.
What this intervention demonstrates
This repair perfectly illustrates the AirGreen philosophy:
an accurate diagnosis , a rapid and lasting intervention , and clear communication with the client .
Our expertise with Midea, Fujitsu, Gree, Sharp, Goodman and Trane systems allows us to quickly correct problems that, if misdiagnosed, could lead to costly replacements.
Why trust AirGreen for your HVAC repairs in Montreal
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Certified technicians trained on the biggest brands
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Fast service in all areas of Montreal, Laval, Longueuil, the North Shore and the South Shore
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Original parts and guaranteed repairs
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Accurate diagnosis using professional tools , such as infrared thermometer and electronic leak detectors
Conclusion
Thanks to our intervention, the Côte-des-Neiges–Notre-Dame-de-Grâce client's Midea wall-mounted air conditioner has regained its full efficiency. Fresh air is once again circulating throughout the home, and the system is operating at its optimal settings, ensuring comfort and energy savings for the coming summer.
At AirGreen , every service call is an opportunity to demonstrate our commitment to quality, precision and customer satisfaction throughout Greater Montreal .