An interview that became an unexpected diagnosis
At AirGreen , every service call is an opportunity to breathe new life into a struggling HVAC system. This time, we were called to Brossard , on the South Shore, for a Fujitsu wall-mounted air conditioner whose owner was noticing low airflow and reduced performance in cooling mode. What was supposed to be a simple preventative maintenance quickly turned into a thorough diagnosis .
Context of the intervention
The customer noticed that the blown air was no longer as cold as it had been before, even after a cursory cleaning of the filters. The indoor unit, installed in an upstairs bedroom, had a buildup of dust behind the front panel and a clogged filter , severely restricting the flow of air.
Once the front panel was opened, the problem became clear: significant fouling of the evaporator and obstruction of the airflow by dirt accumulated over the seasons.
Detailed diagnosis: loss of performance caused by lack of in-depth maintenance
The complete inspection carried out by our technician revealed:
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Clogged filters , preventing good air circulation.
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Evaporator fins covered in greasy dust.
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A minor temperature sensor fault , causing irregular cycles.
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A slight presence of mold on the condensate tray , due to water stagnation.
These combined symptoms explained the drop in cooling power and the abnormal noise heard during start-ups.
Cleaning and refurbishing process
Step 1: Removal and complete cleaning of the filters
Fujitsu's characteristic green filters were carefully removed and cleaned in warm water with a mild detergent . After drying completely, they returned to their original color and transparency.
Step 2: Cleaning the evaporator and tangential fan
Using a biodegradable cleaning product , we degreased the aluminum fins and removed the accumulated dust. The tangential fan was also disinfected to remove any mold deposits.
Step 3: Checking the drainage and condensate tray
We unblocked the drain line and cleaned the tray with a disinfectant solution. This prevents unpleasant odors from forming and ensures smooth drainage of condensation water.
Step 4: Calibrate and test the sensors
After cleaning, the temperature sensor was repositioned and calibrated. A check of the electronic board confirmed stable operation.
Results obtained: efficiency and comfort restored
Upon restart, performance was impeccable:
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Measured blowing temperature: 9°C in cold mode .
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Airflow restored to 100%.
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Operating noise reduced by half.
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No residual odor.
The client immediately noted the return of comfort and quietness to the room, demonstrating the importance of thorough maintenance rather than just a superficial dusting.
AirGreen expertise in Brossard and across the South Shore
This intervention highlights the importance of preventive maintenance of Fujitsu wall systems . Even the most reliable models can lose up to 30% of their efficiency without periodic internal cleaning.
At AirGreen , we apply a comprehensive maintenance method , adapted to each make and model. Our team has certified training on Fujitsu, Midea, Sharp, Zephyr, Trane and Gree units, which allows us to quickly identify the root causes of a drop in performance.
Tips for maintaining the performance of your Fujitsu wall-mounted air conditioner
To avoid repeating this type of situation, we recommend:
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Clean the filters every two months during the summer season.
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Have an annual professional service performed , including cleaning the evaporator and fan.
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Monitor drainage : If you notice standing water, call a technician.
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Never let the filters dry in the sun , this can deform them.
Regular maintenance not only extends the life of your appliance: it reduces energy consumption and preserves indoor air quality .
Conclusion: a Fujitsu wall-mounted air conditioner like new
Thanks to this AirGreen intervention in Brossard , the Fujitsu wall-mounted air conditioner has regained all its original performance and efficiency. The unit is now ready to offer constant comfort throughout the summer, without noise, without odor, and with optimal airflow.
This is exactly what we promise our customers: maintained, reliable and efficient HVAC systems , whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore .
AirGreen – Fujitsu wall-mounted air conditioner maintenance and repair, combining expertise, precision and lasting satisfaction.