When precision meets performance: an AirGreen diagnosis at 22.4°C
At AirGreen , our technicians know that a wall-mounted air conditioner isn't just a simple comfort device. It's a complex system, where every degree counts. During our recent service call in Côte-des-Neiges–Notre-Dame-de-Grâce , we were contacted by a customer whose Fujitsu wall-mounted air conditioner was no longer cooling efficiently. A common situation in the middle of summer, but one that requires a rigorous and methodical approach.
Initial symptom: lukewarm air despite an active compressor
The customer reported that, despite the outdoor unit appearing to be working properly, the air blown by the indoor unit remained lukewarm . This reduced temperature difference between the ambient air and the outgoing air indicated a possible refrigerant pressure or thermal sensor problem.
Upon arrival, we carried out a complete visual inspection : clean filters, no frost, but abnormally warm airflow at the outlet . Using an infrared thermometer, our technician recorded a temperature of 22.4°C , confirming insufficient performance.
In-depth diagnosis: the AirGreen method
Our experts use a multi-step approach:
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Thermal Sensor Check : We tested the indoor temperature sensor, which is responsible for regulating the cooling cycle.
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Analysis of the refrigeration circuit : measurement of the pressure of the R-32 refrigerant gas to detect a possible leak.
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Electrical inspection : check the wiring, electronic module and compressor relay.
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Airflow test : measuring the flow through the exchanger to rule out any turbine problems or obstructions.
Result: the refrigerant pressure was slightly lower than the standard recommended by Fujitsu, which explains the drop in performance.
Intervention: system recharge and calibration
A partial recharge with R-32 refrigerant was carried out according to the manufacturer's specifications. We then:
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Cleaned the evaporator fins with a biodegradable product.
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Checked good communication between the internal and external electronic boards .
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Recalibrated the blowing temperature to ensure optimal cooling around 9°C below ambient temperature .
After the intervention, the infrared thermometer displayed 12.6°C , a sign that the air conditioner was regaining its initial efficiency. The customer immediately noticed a noticeable difference in the comfort of the room.
Why this repair was crucial
A wall-mounted air conditioner operating with insufficient refrigerant doesn't just cool less; it prematurely wears out the compressor , increases power consumption, and compromises the system's durability. By quickly correcting the situation, we've helped restore the unit to optimal energy efficiency and prevented a more costly breakdown.
AirGreen expertise in the service of sustainable comfort
Every AirGreen intervention follows the same philosophy: precision, transparency, and efficiency. Our technicians don't just repair; they optimize and explain each step so the customer understands what caused the breakdown and how to avoid it in the future.
In this specific case, we also recommended:
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Preventive cleaning of the filters every two months .
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A complete annual inspection before the hot season.
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Installing a differential circuit breaker to protect the unit against electrical fluctuations, which are common in Montreal during heat waves.
Conclusion: a refurbished Fujitsu air conditioner, a reassured customer
Thanks to our precise diagnosis and technical rigor , the customer's Fujitsu wall-mounted air conditioner in Côte-des-Neiges–Notre-Dame-de-Grâce is working like new again. Fresh air circulates evenly, the indoor temperature is stabilized, and energy consumption has decreased.
It is this combination of know-how, transparency and local commitment that makes AirGreen a benchmark in HVAC system repair in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
Technical details of the intervention:
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Device Type : Wall-mounted Air Conditioner
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Brand : Fujitsu
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Refrigerant : R-32
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Problem detected : Insufficient gas pressure
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Applied solution : Recharging, calibration and cleaning of the evaporator
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Final result : Air blown at 12.6°C, efficiency restored to 100%
At AirGreen , we pride ourselves on bringing your appliances back to life, one degree at a time.