Repair of a Fujitsu wall-mounted heat pump in Plateau-Mont-Royal

A technical intervention in a typical duplex on the Plateau

At AirGreen , we were recently called for HVAC repair service in a beautiful duplex in Plateau-Mont-Royal . The owner, a contemporary art enthusiast, contacted us after noticing that his Fujitsu wall-mounted heat pump located in the main stairwell was no longer responding properly to remote control commands. The unit, installed high up to optimize air circulation, was exhibiting intermittent behavior: it would turn on without producing any heat or cold, and would abruptly turn off after a few minutes.

Diagnosis: an electronic card failure

Our AirGreen technician began with a thorough inspection of the Fujitsu system. Accessing the system at height required a secure telescopic ladder to reach the wall-mounted unit, which was nearly three meters above the ground. After removing the cover, he immediately noticed the LED indicator blinking irregularly —a typical sign of a faulty control board .

The tests carried out confirmed:

• A stable supply voltage of 240 V.

• A damaged internal PCB at the compressor relay.

• No communication problems between indoor and outdoor units.

• Perfectly clean filters and coils are a sign of good maintenance.

Fujitsu Card Repair and Replacement

Thanks to our stock of genuine Fujitsu parts, our team was able to replace the electronic board on-site without delay. Once the part was installed, a complete restart of the system was performed, followed by a test in both heating and cooling modes . The compressor returned to normal operation, and the heat pump was quickly producing air at 45°C in heating mode.

The owner immediately noticed a clear improvement:

• Smooth and quiet restart.

• Immediate response to commands.

• Thermal stability in the stairwell and adjacent rooms.

AirGreen prevention and monitoring advice

We recommended to the client:

• Complete system maintenance in spring and fall.

• To keep the unit clear of any visual or decorative obstacles.

• Have the condensate drain checked once a year, especially for high-rise installations.

At AirGreen, we understand that the Plateau-Mont-Royal’s often renovated and aesthetically demanding spaces require discreet, efficient, and sustainable HVAC solutions . This project perfectly illustrates our ability to work in complex urban environments without altering the decor or compromising performance.

Recognized expertise throughout Greater Montreal

Our technicians are trained to repair and maintain all Fujitsu wall-mounted heat pumps , as well as those from the Midea, Sharp, Gree, Lennox, Goodman, Bosch and Trane brands, throughout Greater Montreal, Laval, Longueuil, the North Shore and the South Shore .
Each service is carried out according to the highest quality standards, with transparency, precision and compliance with RBQ and CSA standards.

Thanks to this repair, our Plateau client has regained optimal thermal comfort — and the certainty that his Fujitsu heat pump will continue to operate efficiently, summer and winter.

AirGreen – Air Conditioning & Heating in Montreal
Specialists in the repair, maintenance and installation of residential and commercial HVAC systems throughout Greater Montreal.