A quick service call in a bright workspace
One June morning, our AirGreen team was called to a creative studio located in Plateau-Mont-Royal . The client, a visual production contractor, informed us that their Fujitsu wall-mounted air conditioner was no longer cooling the space effectively, despite regular maintenance. In a work environment where temperature and comfort stability influence productivity, such a breakdown needed to be addressed immediately.
First assessment: a well-installed device but losing power
Upon our arrival, the technician performed a complete visual inspection. The Fujitsu wall-mounted air conditioner , installed on a central wall approximately 2.5 meters above the floor, was showing signs of low airflow . No abnormal noise was noticeable, but the room temperature remained around 26°C, well above the programmed setpoint.
The checks revealed:
-
Clogged air filters , reducing airflow.
-
A slightly frosted evaporator coil , a symptom of a partial lack of R-410A refrigerant .
-
A slight accumulation of dust on the interior fan blades.
-
Blowing temperature too high (17°C instead of the expected 10-12°C).
In-depth diagnosis and AirGreen technical approach
Once the initial observations were noted, our technician began the full diagnostic procedure :
-
Checking the operating pressures of the refrigeration circuit using a digital manifold.
-
Check the condensate drain to eliminate any risk of obstruction that could cause secondary icing.
-
Inspection of electrical wiring and relays : no signs of failure or overheating detected.
-
Evaporator temperature sensor analysis : calibrated and functional.
The measurements confirmed a lack of refrigerant , probably due to a micro-leak on a flare connection .
Intervention: complete overhaul of the Fujitsu system
The intervention took place in several stages:
-
Complete recovery of residual refrigerant to prevent loss to the environment.
-
Renovation of the flare connection to the indoor unit, with the addition of a new gasket and tightening calibrated to the torque prescribed by Fujitsu.
-
Vacuum the system for 45 minutes to remove residual moisture.
-
Accurate recharge of R-410A refrigerant , according to the weight specified on the nameplate.
-
Thorough cleaning of the coil and filters with a non-corrosive degreaser.
-
Final performance test : air supply at 10.4°C , standardized air flow, and stable condensation.
Result: an immediate return to comfort and productivity
Just minutes after the repair, the customer noticed a noticeable improvement in cooling throughout the entire space. The Fujitsu wall-mounted air conditioner returned to its original energy efficiency, and the room temperature stabilized at 22°C.
At AirGreen , we always insist on quality diagnostics before any refill or part replacement. This approach not only allows us to avoid unnecessary interventions, but also to guarantee increased longevity of HVAC equipment .
AirGreen Tips to Prevent Wall-Mounted Air Conditioner Breakdowns
We took advantage of our visit to remind you of some good preventive maintenance practices :
-
Clean the filters once a month during the summer season.
-
Maintain clearances around the indoor unit for optimal air circulation.
-
Have a complete professional maintenance carried out every spring to avoid loss of performance.
-
Monitor any unusual noise or temperature variations , signs of possible system imbalance.
AirGreen: Your HVAC Partner in Montreal and Beyond
Every intervention like this reinforces the trust our customers place in our expertise. Whether you own a business in Plateau-Mont-Royal , a house in Laval , a condo in Longueuil , or a cottage on the North Shore or the South Shore , our team is available for all your HVAC system repair, maintenance, or installation needs.
AirGreen is technical rigor, transparency and a service that goes well beyond simple repairs.