Accurate diagnosis and cooling found in downtown Montreal
At AirGreen , every service call is an opportunity to demonstrate our expertise in HVAC system repair and our commitment to sustainable performance. On this day, our team was dispatched to a condo in the Ville-Marie district of Montreal , to work on a Gree wall-mounted air conditioner whose customer was complaining about the lack of cooling power .
Symptoms observed
The customer noticed that, even when set to 18°C, his wall-mounted air conditioner was blowing lukewarm air. This symptom, common in the summer, can be caused by several factors: lack of refrigerant, a faulty temperature sensor, or a faulty electronic board.
On site, we immediately noticed that the air outlet temperature was only 19.7°C , well above normal.
Initial inspection
Our technician began with a complete analysis of the cooling cycle :
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Checking the air filters , slightly dirty;
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Cleaning the evaporator coil ;
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Checking electrical connections and communication wiring;
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Measurement of the supply and suction temperature using a precision infrared thermometer.
The sensor reading indicated 10.2°C after restarting the compressor, confirming that the system was starting to produce cold efficiently again after some adjustments.
Diagnosis confirmed
Upon inspection, the main problem was a dirty and slightly misaligned indoor temperature sensor , causing the ambient temperature reading to be inaccurate. This failure prevented the unit from properly modulating the compressor and fan speed.
Intervention carried out
Our AirGreen team took the following steps:
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Disassembly and repositioning of the temperature sensor;
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Complete cleaning of the coil and condensate tray;
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Resetting the electronic system to clear the error code;
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Full performance test in cooling mode.
A few minutes later, the Gree air conditioner was blowing stable air at 10°C , a sign of optimal performance and fully restored heat exchange.
Technical details of the intervention
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Brand : Gree
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Device type : Wall-mounted air conditioner (mini-split)
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Estimated power : 12,000 BTU
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Reported issue : Insufficient cooling
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Cause identified : Temperature sensor incorrectly calibrated and internal fouling
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Parts replaced : None, repositioning and cleaning only
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Result obtained : Blowing temperature brought back to 10°C, performance restored
AirGreen Recommendations
Before leaving the premises, we advised the client to:
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Clean filters every three weeks during periods of heavy use;
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Let the unit run for a few minutes in ventilation mode after air conditioning to remove internal humidity ;
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Schedule annual preventative maintenance to ensure sensor stability and compressor durability.
A satisfied customer and renewed comfort
A few hours after our departure, the client confirmed that the temperature in his condo had stabilized at 23°C , with quiet and regular operation. Further proof that the precise maintenance and responsiveness of our AirGreen technicians make all the difference in Montreal, Laval, Longueuil, on the North Shore and the South Shore .