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

When a quiet air conditioner suddenly stops being quiet

At AirGreen , we frequently receive calls from concerned customers after noticing unusual noises or a sudden drop in performance from their wall-mounted air conditioning system. This was the case during our recent intervention in Sainte-Rose (Laval) , where a customer contacted us about a Fujitsu wall-mounted air conditioner that was emitting an abnormal humming noise and was no longer cooling effectively.

Initial diagnosis: a disturbing noise and plummeting performance

Upon arrival, we found that the outdoor unit—installed on a wall bracket along a narrow passageway—was working, but with an unusual metallic vibrating noise . The customer, who was very diligent about maintaining his unit, had noticed a decrease in cold airflow over the past few days.

Our technician first carried out a complete visual check:

  • Checking the cleanliness of the condenser ;

  • Observation of abnormal vibrations coming from the fan;

  • Compressor starting current test;

  • Inspection of condensate pipe and supply wiring.

Result: The external fan was showing signs of mechanical wear. The motor shaft was vibrating slightly, causing noise and reducing airflow.

Steps of repair

Once the diagnosis was confirmed, we took the following steps:

  1. Safe disconnection of the system to avoid any electrical risk.

  2. Removing the front condenser grille to access the fan.

  3. Complete cleaning of the coil using a biodegradable product to optimize heat exchange.

  4. Replacement of the fan motor , with an equivalent Fujitsu model approved by the manufacturer.

  5. Realignment of the wall support , slightly off-center, to avoid noise resonance in the structure.

  6. Complete final performance test (pressure, temperature, intensity).

The result was immediate: silence restored, constant airflow , and above all an interior temperature stabilized in less than 15 minutes .

AirGreen Expertise: Precision and Sustainability

Every service call at AirGreen is handled with the same rigor. Our technicians don't just "fix" a symptom: they analyze the root cause. In this case, premature motor wear was caused by a minor mechanical imbalance , amplified by a slightly forward-tilted installation. We corrected this detail to prevent further vibration and extend the compressor's life.

Maintenance tips to avoid breakdowns

In order to avoid the repetition of this type of problem, we recommended that the customer:

  • Clean the internal filters every 30 days during the warm season;

  • Check the clearance around the outdoor unit (at least 30 cm);

  • Schedule an annual AirGreen inspection , before summer, to ensure optimal performance.

Why trust AirGreen

Based in Montreal and active throughout the North Shore and South Shore , we combine technical expertise , precise diagnosis , and long-lasting interventions . Each repair is an opportunity to strengthen the performance of your HVAC system while ensuring your comfort.

At AirGreen, we believe that a well-maintained system, regardless of brand— Fujitsu, Gree, Sharp, Midea, or Goodman —should provide years of peace of mind. Our team ensures this is the case, for every customer, at every visit.