A revealing service call: a wall-mounted appliance struggling to keep up
At AirGreen , we were recently called to diagnose a Fujitsu wall-mounted air conditioner installed in an elegant apartment in Ville Mont-Royal . The unit, an aged beige reminiscent of models from the 2000s, sat above an antique solid wood cabinet. The customer contacted us after noticing that the air blown was lukewarm and that the outdoor compressor was no longer starting regularly .
Step 1: Complete inspection and initial findings
Upon our arrival, our certified technician carried out a complete visual and functional check :
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The indoor unit was blowing air, but the temperature remained constant, a sign of an inactive refrigeration cycle .
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The outdoor unit , an old Fujitsu compressor, showed no electrical activity despite a cooling call.
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A very slight trace of oil on a refrigeration pipe connection pointed our diagnosis towards a refrigerant leak .
Step 2: Pressure Test and Leak Detection
We performed a nitrogen leak test to confirm the pressure loss. The leak was coming from a slightly cracked flare fitting , typical of long-standing installations subject to expansion cycles.
After isolating the leak, we have:
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Replaced the fitting with a reinforced model.
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Checked the complete vacuum of the circuit using a calibrated vacuum pump.
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Recharged the system with the exact amount of R410A refrigerant specified by Fujitsu.
Step 3: Restart and Calibrate the System
Once the repair was complete, we performed a soft reboot of the system . After a few minutes:
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The compressor started normally.
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The temperature differential between suction and discharge was within the manufacturer's standards.
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The indoor air went from 25°C to 19°C in less than 10 minutes .
Step 4: Preventive maintenance and customer advice
To extend the life of the air conditioner, our technician has:
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Cleaned the dirty internal filters .
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Blown the coils of the outdoor unit to improve heat exchange.
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Checked the proper functioning of the condensate drain , often the cause of interior humidity.
We also recommended that the customer schedule annual maintenance , especially for older Fujitsu units, to avoid gradual degradation of energy efficiency.
Step 5: Final Result
The customer immediately noticed that his Fujitsu wall-mounted air conditioner was back in operation efficiently . Cool air circulated evenly throughout the living room, and the system was back to its rated capacity of 12,000 BTUs .
A repair typical of AirGreen know-how
This type of intervention perfectly illustrates AirGreen's philosophy:
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Accurate and transparent diagnosis.
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Durable repair rather than premature replacement.
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Strict compliance with HVAC and environmental standards (particularly for the handling of refrigerant).
Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our technicians intervene quickly to bring your Fujitsu, Midea, Gree, Sharp systems, or any other popular brand in Quebec back to life.
AirGreen – HVAC Repair Experts in Town of Mount Royal
✅ Complete and transparent diagnosis
✅ RBQ and CCQ certified repairs
✅ Fast, professional and respectful service