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Réparation d’un climatiseur mural Fujitsu à Sainte-Dorothée
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Fujitsu wall-mounted air conditioner repair in Sainte-Dorothée

An AirGreen service call for restored comfort

At AirGreen , we recently performed an HVAC service call in Sainte-Dorothée (Laval) for a Fujitsu wall-mounted air conditioner installed in a single-family residence. The customer noticed that the unit was no longer effectively cooling the upper floor, despite basic maintenance performed in the spring. With the arrival of a heat wave, he preferred to call our certified technicians for a complete diagnosis and rapid repair.

Initial diagnosis: loss of performance without apparent error

Upon arrival, we noticed that the Fujitsu wall-mounted air conditioner was working without error codes, but the airflow coming out was not as cold as it should be. Using our infrared thermometer , the temperature measured at the air outlet was 14.8 °C , while a well-calibrated unit should blow between 7 and 9 °C .

Our technicians have undertaken a series of rigorous checks:

  • Air filters : slightly dirty, requiring thorough cleaning.

  • Evaporator coil : accumulation of fine dust, reducing heat exchange.

  • Indoor fan : stable rotation, no imbalance detected.

  • Outdoor condenser : cleanliness correct, but refrigerant level slightly insufficient .

  • Temperature probe : stable reading, no electronic fault.

These findings pointed our diagnosis towards a micro-leak of refrigerant or a charge imbalance in the refrigeration circuit.

Repair Steps

After discussing with the client, we carried out a complete intervention to restore the optimal performance of the system:

  1. Thoroughly clean the indoor unit using a biodegradable product to remove all traces of dust and grease.

  2. Inspection of the refrigeration circuit with electronic leak detector: a micro-leak at the flare connection between the indoor unit and the piping was detected.

  3. Tightening of the fitting with torque application in accordance with Fujitsu specifications.

  4. 30 minute nitrogen leak test : no leaks detected after retightening.

  5. Recharge the system with R410A refrigerant according to the recommended nominal pressures.

  6. Checking the outlet temperature after repair: stabilized at 7.2°C , confirming the return to normal performance.

Final result and recommendations

Once the repair was completed, the unit returned to its original performance . The customer immediately noticed an improvement in thermal comfort upstairs, with quieter operation and better temperature stability.

Our technicians took the opportunity to remind you of some good maintenance practices:

  • Clean filters every 4 to 6 weeks.

  • Check the coils at the start of each season.

  • Avoid covering outdoor units , even in winter, to prevent condensation.

  • Schedule professional annual maintenance , including checking the refrigerant and condensate drainage system.

AirGreen expertise in Laval

Thanks to our HVAC expertise , we operate every day throughout the Laval region and its surrounding areas — Sainte-Dorothée, Vimont, Fabreville, Chomedey and Laval-des-Rapides — to diagnose and repair air conditioning systems and wall-mounted heat pumps from well-known brands such as Fujitsu, Gree, Sharp, Midea and Daikin .

Our commitment:

  • Intervene quickly , often the same day.

  • Use certified parts and products to extend the life of your equipment.

  • Ensure RBQ compliance and system security after each intervention.

Conclusion

This Fujitsu wall-mounted air conditioner repair in Sainte-Dorothée perfectly illustrates the importance of an accurate diagnosis and professional intervention. At AirGreen , we don't just restore