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Réparation d’un climatiseur mural Fujitsu à Saint-Laurent
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Fujitsu wall-mounted air conditioner repair in Saint-Laurent

When an old wall-mounted air conditioner suddenly stops cooling

At AirGreen , we often work on older wall-mounted units that, despite their past reliability, eventually show signs of wear. This is exactly what happened in an apartment in the Saint-Laurent district of Montreal , where a customer contacted us after noticing that their Fujitsu wall-mounted air conditioner was no longer producing cold air, even at full power.

Diagnosis: an aging Fujitsu and degraded performance

The Fujitsu indoor unit, in a beige color typical of models from about fifteen years ago, showed several symptoms:

  • The blown air remained lukewarm, despite a set point of 18°C.

  • The outdoor compressor appeared to be running intermittently.

  • No error lights were displayed, but the device made a slight clicking noise every time it tried to restart.

Upon our arrival, we started with a complete inspection :

  1. Cleaning the air filter and indoor coil : significant dust accumulation.

  2. Check refrigerant pressure : abnormally low level.

  3. Analysis of the refrigeration circuit using an electronic detector: detection of a micro-leak on the flare connection at the rear of the indoor unit.

Intervention: leak repair and system upgrade

Once the diagnosis was confirmed, our technician carried out a complete repair, step by step:

  1. Power off and secure the unit.

  2. Disassembly of the side panel to access the copper connection.

  3. Replace the flare joint and tighten the fitting with a torque wrench.

  4. Vacuum the system for 45 minutes to remove any moisture.

  5. Recharge R-410A refrigerant according to the original capacity of the Fujitsu model.

  6. Full performance test after power up.

Within minutes, the cold airflow was back, steady and powerful.

Result: restored efficiency and a satisfied customer

Post-repair measurements confirmed the system's full effectiveness :

  • Blown air temperature: 8°C in cooling mode.

  • Operating pressure: in accordance with Fujitsu values.

  • Noise level: normal.

The customer immediately felt the difference. After several days of operation, he confirmed to us by phone that the performance was significantly better than before the intervention .

We also recommended annual maintenance to prevent minor leaks or dust buildup in the coils from returning.

Why these old Fujitsu units are losing efficiency

Fujitsu wall-mounted air conditioners produced in the early 2000s are known for their robustness, but several factors can explain a gradual loss of performance:

  • Aging of flare joints , often responsible for small leaks.

  • Oxidation of coils due to ambient humidity.

  • Dust deposits on heat exchangers , reducing heat transfer.

  • Slight drop in compression in the compressor after several years.

These issues, while common, can be effectively corrected with a thorough inspection and targeted repair performed by an AirGreen certified technician.

AirGreen: the benchmark in HVAC repairs in Montreal and on the North and South Shores

Our teams operate every day in Montreal , Laval , on the North Shore and the South Shore for all types of HVAC repairs :

  • Wall-mounted air conditioners Fujitsu, Gree, Midea, Sharp, Goodman , etc.

  • Multi-Zone and central heat pumps .

  • Ducted systems, consoles and ceiling cassettes .

  • PTAC and business units .

Our approach is based on three pillars: precise diagnosis , total transparency , and lasting repair . Each intervention aims to extend the life of your device while optimizing its energy performance.

AirGreen Tips for Maintaining Your Fujitsu Wall-Mounted Air Conditioner

To avoid breakdowns and loss of efficiency, we recommend:

  • Clean the air filters every two months during the summer season.

  • Have the refrigeration connections inspected once a year.

  • Keep coils clean with professional cleaning.

  • Do not neglect signs of wear (abnormal noises, warm air, condensation).

  • Plan preventative maintenance in the spring before the heatwave.

These good practices not only ensure constant comfort , but also reduce your energy consumption .

A typical AirGreen intervention: speed, rigor and reliability

This repair in Saint-Laurent illustrates our way of working well:

  • A quick but precise diagnosis.

  • A complete repair without compromising on quality.

  • Clear communication with the customer.

At AirGreen, we believe that every HVAC repair is an opportunity to restore comfort, but also confidence . And it's this philosophy that sets us apart throughout Greater Montreal .