Fast and accurate service in the heart of the North Shore
At AirGreen , we know that a broken heat pump can quickly compromise a home's comfort. This is exactly what a family in Boisbriand , on Montreal's North Shore , experienced when their Fujitsu wall-mounted heat pump stopped working on a particularly hot July day.
Our team went on site to diagnose and repair the fault with the rigor and expertise that characterize our HVAC service.
Initial diagnosis: one outdoor unit at a complete standstill
Upon arrival, we found that the outdoor unit—a Fujitsu Halcyon model—had been temporarily placed on a garden table by the customer, believing the elevation would help improve airflow. However, this unusual setup revealed an internal electrical issue : the outdoor fan was no longer turning on.
After a series of electrical tests, our technician confirmed that the control board was no longer transmitting the signal needed to activate the fan motor. The indoor unit, meanwhile, was displaying an error code indicating a communication failure between the two modules.
Repair steps: from inspection to return to service
1. Checking connections and wiring
We first inspected the electrical connections between the indoor and outdoor units. In this case, we found partially melted insulation on the power cable, likely caused by water infiltration over time.
2. Replacing the control board
After confirming the short circuit on the main electronic board, we proceeded to completely replace it with an original Fujitsu part compatible with this Halcyon R-410A model.
3. Test the ventilation motor
The fan motor was tested separately to rule out any mechanical failure. After replacing the board, powering up confirmed that the system rebooted successfully.
4. Checking the refrigeration circuit
We then carried out a refrigerant level check (R-410A) using our measuring instruments. The pressure was in accordance with the manufacturer's specifications, ruling out any gas leaks.
5. Cleaning and realigning the outdoor unit
As the unit had been moved several times, we replaced the heat pump on its original wall mount , ensuring adequate condensate drainage and free ventilation around the condenser. A complete cleaning of the fins was also carried out to optimize heat transfer.
Result: comfort restored and efficiency restored
After these interventions, the heat pump regained its optimal performance :
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Blown air temperature at 12°C during air conditioning test.
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Stable operating cycle without error codes.
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Normal power consumption according to wattmeter measurements.
The Boisbriand family immediately felt the difference: uniform freshness in all rooms , and a lower noise level thanks to the complete reset of the control board.
Our Fujitsu expertise serving the North Shore
Fujitsu Halcyon systems are renowned for their reliability, but like all HVAC equipment, they require rigorous maintenance to maintain their performance. At AirGreen, we provide repair, maintenance, and complete calibration of Fujitsu wall-mounted heat pumps throughout the North Shore, Laval, Montreal, and South Shore .
Our certified technicians know how to diagnose:
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Electronic failures (control board, sensors, communication).
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Ventilation problems (motors, bearings, obstruction).
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Refrigerant leaks (R-410A or R-32 depending on recent models).
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Condensate blockages or coil icing .
With a local inventory of Fujitsu parts and timely scheduled interventions, we minimize periods of inconvenience for our residential and commercial customers.
Maintenance tips to prevent future breakdowns
To ensure the longevity of your Fujitsu wall-mounted heat pump, we recommend:
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Clean the indoor unit filters every 4 to 6 weeks.
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Check the free space around the outdoor unit (at least 30 cm).
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Schedule a complete annual maintenance , including checking the pressures and the electronic card.
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Never move the condenser without properly disconnecting the refrigeration lines.
These precautions help prevent costly damage and preserve the manufacturer's warranty .
AirGreen: your HVAC reference in Boisbriand and throughout Greater Montreal
At AirGreen , every intervention is carried out with professionalism, transparency and passion for the job . Whether it's a simple service call or a complex breakdown, our priority remains the same: to restore the thermal comfort of your home quickly and sustainably.
We operate daily in Montreal, Laval, Longueuil, on the North Shore and the South Shore , for all types of HVAC repairs , including the brands Fujitsu, Gree, Midea, Mitsubishi, Sharp, Goodman, Trane , and many others.
AirGreen – Heating, ventilation and air conditioning experts at your service throughout Quebec.