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.

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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.

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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.

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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.

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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.

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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.

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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 .

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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 .