Rapid diagnosis and effective intervention in a typical Montreal building
At AirGreen , we respond to service calls daily in residential buildings across Montreal. On this day, our team went to the Outremont neighborhood, to an elegant red brick building, to diagnose and repair a Fujitsu wall-mounted heat pump that was showing signs of weakness in cooling mode.
The client, the owner of a second-floor condo, noticed that his unit was no longer maintaining a stable temperature. The outdoor unit, installed on a small balcony, seemed to operate intermittently. A common problem, but one that required a thorough inspection and specialized expertise.
Symptoms reported by the customer
When we arrived, the client explained to us that:
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The device sometimes blew cold air, sometimes lukewarm;
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The operating indicator light was flashing irregularly;
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And above all, electricity consumption had recently increased, a sign of weakened performance.
At first glance, the installation appeared to be in good condition: unit securely mounted, no abnormal noise. But these symptoms suggested an anomaly in the refrigeration circuit or the temperature sensor .
Steps of diagnosis by our AirGreen technician
Our HVAC repair experts always carry out a rigorous diagnosis before any intervention:
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Checking the interior filters : slight clogging was reducing the air flow.
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Inspection of the evaporator coil : some traces of oil, indications of a possible micro-leak of refrigerant .
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Analysis of the error code via the electronic card : the flashing indicated a pressure sensor error .
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Circuit pressure test : the pressure gauge confirmed a lack of R410A refrigerant .
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Inspection of the outdoor unit : the compressor was difficult to start, a sign of thermal stress due to a low fluid level.
The verdict: minor leak on a flare fitting , causing loss of performance and excess energy consumption.
Complete repair and refurbishment of the system
The intervention took place in several meticulous stages:
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Complete purge of the circuit to eliminate impurities;
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Re-bracing of the fitting and replacement of the flare joint ;
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Nitrogen test to ensure the circuit is watertight;
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Complete recharge with R410A refrigerant according to Fujitsu specifications;
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System reboot and calibration ;
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Blowing temperature measurement : air at 9°C was now coming out of the unit, a sign of optimal performance.
Results: comfort and efficiency restored in Outremont
After the repair, the unit ran smoothly, quietly and efficiently. The customer immediately felt the difference: uniform cooling , thermal stability and, above all, quiet operation typical of Fujitsu models.
We also advised the customer to schedule annual maintenance —essential to extend the life of the unit and prevent performance losses.
AirGreen Tips for Maintaining a Fujitsu Wall-Mounted Heat Pump
To prevent such problems from recurring, our technicians recommend:
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Clean the filters every two months;
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Never obstruct the air outlets of the indoor unit;
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Schedule a professional interview at least once a year;
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Avoid overusing the continuous dehumidification function , which strains the compressor.
Proper maintenance can extend the life of a wall-mounted heat pump by more than 10 years , while maintaining its maximum energy efficiency.
AirGreen expertise: a trusted service throughout Montreal
Whether it's for a Fujitsu, Gree, Mitsubishi or Midea wall-mounted heat pump , our certified technicians respond quickly in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
We offer:
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A precise and transparent diagnosis before any intervention;
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Guaranteed repairs ;
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Personalized advice to optimize comfort and reduce energy consumption.
Conclusion: lasting comfort and renewed confidence
Thanks to our prompt and professional intervention, the Fujitsu heat pump in this Outremont condo is now working like new. The client has regained summer comfort and the confidence that their HVAC system is in good hands—those of the AirGreen team .