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Réparation d’une thermopompe murale Fujitsu à Saint-Lambert
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Repair of a Fujitsu wall-mounted heat pump in Saint-Lambert

successful in Saint-Lambert

At AirGreen , we were recently called for an HVAC service call in Saint-Lambert , on the South Shore of Montreal , to diagnose a Fujitsu wall-mounted heat pump that had stopped working properly. The client, the owner of a modern multi-family building, had noticed that the outdoor unit was no longer producing heat in heating mode and was making an unusual noise when it started up.

Initial diagnosis: clear signs of a compressor problem

Upon arrival, we found the Fujitsu outdoor condenser ( Halcyon series model) to be well maintained, installed on treated wood supports, and properly leveled. However, the intermittent metallic noise at startup and rapid shutdown of the operating cycle indicated a possible failure of the compressor or the power supply circuit board .

Before any intervention, our certified technicians have:

  • Checked the R-410A refrigerant pressure using our DeWalt tool kit, seen in the photo.

  • Checked the continuity of the electrical circuits and the supply voltage.

  • Inspected the wiring between the indoor and outdoor unit.

The diagnosis quickly confirmed a faulty control board , causing the compressor to shut down after a few seconds of operation.

Fast and safe repair

We replaced the main electronic card with an original Fujitsu part, which we regularly keep in stock for our interventions in the Montreal and South Shore regions.

Once the card was replaced, our technicians carried out:

  • A complete operational test of the system in heating and cooling mode.

  • A check of the air flow and the blowing temperature.

  • An analysis of the compressor starting current to ensure stable performance.

The compressor restarted silently, and the heat pump regained its full efficiency.

Optimization and maintenance tips

Our experts took advantage of the visit to advise the client on:

  • Regular cleaning of the internal filters (every 3 months).

  • The annual professional inspection , particularly before the winter season.

  • Clear the area around the outdoor unit to ensure good ventilation and avoid the accumulation of leaves or debris.

We also noticed the presence of other outdoor units from various brands (Goodman, Lennox, Midea) aligned on the same concrete slab. This shared space, typical of modern condominiums, requires increased vigilance regarding air circulation between the units.

Result: comfort restored and performance restored

Thanks to this targeted intervention, the Fujitsu wall-mounted heat pump has returned to full capacity, once again providing consistent comfort to residents while reducing energy consumption. The client was particularly satisfied with the speed of our intervention and the transparency of our diagnosis.

At AirGreen , we understand the importance of a reliable HVAC system, especially in densely populated residential areas like Saint-Lambert . That's why our teams are ready to intervene at any time, anywhere on the South Shore , in Montreal , Laval and on the North Shore , for any wall-mounted, central or multi-zone heat pump repair .

In summary: our expertise in the service of lasting comfort

  • Brand: Fujitsu

  • Type: Wall-mounted heat pump (mini-split)

  • Location: Saint-Lambert (South Shore of Montreal)

  • Problem: Electronic card failure causing the compressor to stop

  • Solution: Card replacement and complete system recalibration

  • Result: Stable, silent and efficient system

Another successful repair by AirGreen , your trusted HVAC partner in Montreal and the surrounding area.