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Réparation d’un Climatiseur Mural Fujitsu à Ville Mont-Royal
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Fujitsu Wall-Mounted Air Conditioner Repair in Ville Mont-Royal

Precision diagnosis and complete refurbishment of the HVAC system

At AirGreen , every service call is an opportunity to apply our technical expertise and passion for residential comfort. On this day, our team responded to Town of Mount Royal to diagnose and repair a Fujitsu wall-mounted air conditioner that was no longer cooling the home effectively.

Symptoms observed by the client

The owner contacted us after noticing a noticeable drop in performance:

  • Warm air coming out of the indoor unit, even after several minutes of operation.

  • Room temperature not falling below 25°C despite the set point being 20°C.

  • Normal ventilation noise, but no feeling of freshness.

Before our visit, we advised the customer to check the air filter and circuit breaker—two common causes of poor performance. When these checks revealed nothing, our team visited the site for a full diagnostic.

Thorough technical inspection

Upon arrival, we carried out a series of checks on the Fujitsu wall unit:

  1. Measuring the air outlet temperature using a professional infrared thermometer. Result: 14.6°C — a sign that the cooling cycle was partially active, but insufficient.

  2. R410A refrigerant pressure check : reading below manufacturer's standard, indicating gas loss.

  3. Visual inspection of the refrigerant line between the indoor unit and the compressor: no visible traces of oil, but a slightly oxidized flare connection .

  4. Evaporator temperature sensor check : inconsistent value on multimeter, confirming reading failure.

Diagnosis confirmed: minor leak and defective probe

The problem stemmed from a small refrigerant leak combined with a faulty evaporator sensor . This combination prevented the air conditioner from properly sensing the air temperature and maintaining a stable cooling cycle.

Repair Steps

Our team undertook a complete repair in several stages:

  • Recovery of remaining refrigerant in accordance with environmental standards.

  • Partial disassembly of the front to access the temperature probe.

  • Replacement of the probe with an original Fujitsu part, guaranteeing compatibility and precision.

  • Remanufacture of the flare fitting , solvent cleaning and new sealing .

  • Completely vacuum the circuit for 30 minutes to remove moisture.

  • Recharge with R410A refrigerant at nominal pressure.

Performance Verification

Once the repair was complete, we rebooted the system and performed cross-tests:

  • Stable air outlet temperature at 6.8°C after 10 minutes.

  • Ambient temperature difference of more than 8°C in 25 minutes.

  • Balanced pressures, without abnormal fluctuations.

We also showed the customer, using the infrared thermometer, the difference between the initial temperature (14.6°C) and the final temperature – visual proof of the system's restored efficiency.

Comfort restored and customer reassured

The Fujitsu wall-mounted air conditioner has regained its full cooling power. The customer immediately noticed the uniform coolness in the rooms , and the noise level remained perfectly stable.

We then shared some recommendations with him:

  • Clean the filters once a month during the summer season.

  • Schedule annual AirGreen maintenance to prevent loss of performance.

  • Maintain a clear distance around the indoor unit for good air circulation.

AirGreen expertise in Town of Mount Royal

This intervention perfectly illustrates our rigorous approach to HVAC system repair in Montreal, Laval, Longueuil and on both shores. Our certified technicians have the experience and tools necessary to quickly diagnose the most subtle faults on all major brands: Fujitsu, Midea, Sharp, Gree, Lennox, Trane, Bosch, and more .

Each AirGreen service is based on three pillars:

  1. Accurate diagnosis using professional instruments.

  2. Quality of the replaced parts , always original manufacturer.

  3. Compliance with safety and environmental standards at every stage.

Conclusion

Thanks to a targeted and methodical intervention, this Fujitsu wall-mounted air conditioner repair in Ville Mont-Royal restored optimal comfort to the home while extending the system's lifespan. At AirGreen, we believe that maintenance done well is worth more than a breakdown avoided—that's why we make every effort to ensure the reliability and performance of every HVAC unit we service.