A service call on an urban terrace in Montreal
At AirGreen , we frequently receive calls from urban condominiums where outdoor heat pump units are installed on terraces or balconies. This is precisely the case with this intervention in Rosemont–La Petite-Patrie , where a customer contacted us about a Fujitsu wall-mounted heat pump that was no longer producing cold despite the fan being turned on.
This installation, well positioned on a wall mount with adequate clearance, provided an environment conducive to performance. However, the diagnosis would reveal an internal problem requiring in-depth expertise.
Diagnosis: A faulty control board and an altered gas charge
Upon our arrival, we carried out a complete examination of the Fujitsu system :
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checking the supply voltage,
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visual inspection of the refrigeration circuit,
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refrigerant pressure measurement,
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reading error codes on the electronic panel.
The fan was operating normally, but the compressor was not starting , although the control voltage was being transmitted correctly. Analysis of the power module (PCB) revealed a faulty control board —a common failure on some models after several years of exposure to heat and vibration.
Furthermore, the R-410A refrigerant charge had become slightly depleted, probably due to an old and minimal leak, detected using our electronic detector.
Repair steps: AirGreen rigor and reliability
Our technicians followed a strict protocol to restore the original performance of the Fujitsu system:
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Replacement of the control board with a genuine Fujitsu part, ensuring compatibility and durability.
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Repair of the leak at the flare fitting and replacement of the sealing gasket.
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Completely vacuum the circuit for 30 minutes to eliminate all traces of humidity.
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Complete recharge with R-410A at the nominal pressure according to the nameplate.
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Complete performance test , including temperature measurements and static/dynamic pressures.
Once the system was restarted, the compressor restarted silently, and the cold airflow quickly returned to its original intensity.
Result: restored comfort and optimized efficiency
Thanks to this intervention, the customer noticed an immediate drop in the interior temperature and more stable operation of his appliance. Energy efficiency was also improved, reducing electricity consumption by almost 15%.
We then advised the client to carry out annual preventive maintenance , which is particularly important for outdoor units located on terraces exposed to the sun and urban dust. This maintenance helps prevent:
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micro-leaks of refrigerant,
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premature electronic failures,
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dirt buildup on coils,
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and abnormal defrost cycles.
AirGreen: HVAC expertise in the heart of Montreal
Through our interventions in Montreal , Laval , Longueuil , on the North Shore and the South Shore , we are committed to offering a highly professional and sustainable HVAC service .
Every repair, whether it is a Fujitsu , Midea , Gree , Sharp or Goodman heat pump, is carried out according to strict quality standards.
Our philosophy is based on three pillars:
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Transparency : clear diagnosis and detailed explanations to the client.
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Efficiency : rapid interventions with original parts.
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Sustainability : optimizing the energy performance of systems.
Conclusion: A Fujitsu heat pump ready for summer
This successful repair in Rosemont–La Petite-Patrie perfectly illustrates our expertise and our commitment to the comfort of our Montreal customers.
The refurbished Fujitsu wall-mounted heat pump is now ready to provide reliable and energy-efficient cooling , summer and winter.
If you're experiencing a similar problem—noise, loss of efficiency, leakage, or error code— trust AirGreen for a quick diagnosis and a lasting solution.