A service call on a narrow balcony
At AirGreen , we regularly work in residential settings where wall-mounted heat pump outdoor units are installed in tight spaces—balconies, building corners, or small patios. This is exactly the situation encountered during this service in Rosemère , on Montreal's North Shore. The client contacted us after noticing that their Crystal heat pump was no longer blowing hot air in heating mode, despite the unit starting up normally.
The unit, installed on a concrete balcony on the second floor, appeared intact at first glance. However, a crucial detail quickly caught our attention: the external fan was completely motionless , while the compressor was indeed starting up.
Accurate diagnosis: a faulty fan motor
From the start of our inspection, our technicians followed the AirGreen method, combining electrical measurements and mechanical checks :
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Voltage test at the fan motor: voltage present, therefore control board functional.
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Manual check of the fan wheel : partial blockage due to a seized axle.
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Start capacitor examination : abnormal capacitance value, sign of advanced wear.
The diagnosis was therefore clear: the outdoor fan motor was defective and the capacitor had to be replaced . This type of failure is common on units exposed to the extreme temperature variations typical of the Quebec climate.
AirGreen intervention: replacement and calibration on site
To restore the proper functioning of the heat pump, our team carried out a complete repair on site , without completely dismantling the unit:
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Replacement of the fan motor with an original Crystal replacement model, compatible in speed and power.
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Change the starting capacitor and check the nominal capacity (5 µF).
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Cleaning the condenser coil to remove dust deposits accumulated during the winter.
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Tighten electrical connections and check grounding.
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Complete functional test in air conditioning and heating modes.
After restarting, the unit returned to smooth and quiet ventilation , and the operating pressure returned to normal ranges.
Results: restored performance and immediate comfort
In less than two hours, the Crystal heat pump was fully operational again. The flow of hot air inside the home was once again constant, and the room temperature quickly reached the thermostat's setpoints.
The customer, impressed by the speed of the intervention, also appreciated our advice for preventing future winter breakdowns :
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Run the heat pump in ventilation mode for a few minutes each week, even during the off-season.
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Clear the ventilation grille regularly to prevent dust accumulation.
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Schedule an annual professional maintenance before each winter to ensure the motor and capacitor are in good condition.
What this intervention reveals: the importance of good positioning
Installing an outdoor unit on a concrete balcony, as in this case in Rosemère, presents a double challenge:
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Restricted ventilation (proximity to walls and railings).
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Accumulation of moisture which accelerates corrosion and mechanical wear.
That's why, during our visits, we always recommend installing the units on wall brackets or raised bases to improve air circulation and facilitate condensate drainage. These details make a major difference in the durability and overall performance of your system.
AirGreen expertise: a guarantee of reliability on the North Shore
For several years, AirGreen has been providing repair, maintenance and installation of HVAC systems throughout the Greater Montreal area, including Rosemère, Sainte-Thérèse, Blainville, Terrebonne and Laval .
Our factory-trained technicians are fully familiar with brands like Crystal, Gree, Midea, Fujitsu, Sharp, Zephyr and Goodman , and use only certified replacement parts .
Each intervention is carried out with rigor, transparency and respect for building safety standards — values that make AirGreen a benchmark in sustainable residential comfort.
In summary
This Crystal wall-mounted heat pump repair in Rosemère demonstrates the importance of regular maintenance and rapid response at the first signs of failure. Thanks to our expertise, the system was back up and running the same day, ensuring reliable heating for the remainder of the winter season.
At AirGreen, every service call is an opportunity to ensure your comfort, safety and the longevity of your HVAC equipment .