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Réparation d’une thermopompe murale Fujitsu à Rosemont–La Petite-Patrie
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Repair of a Fujitsu wall-mounted heat pump in Rosemont–La Petite-Patrie

When a Fujitsu heat pump malfunctions in the spring: an intervention by AirGreen

Spring often means a reboot for HVAC systems after a harsh winter. In Rosemont–La Petite-Patrie , a customer recently contacted us after noticing that their Fujitsu Halcyon wall-mounted heat pump was no longer heating efficiently and was producing abnormal noise outside . This is a common occurrence at this time of year, when temperature fluctuations put a strain on the electronic and mechanical components of wall-mounted units.

A complete roof diagnosis

Installed on the typical flat roof of Montreal duplexes, this Fujitsu Halcyon heat pump was one of the brand's compact inverter models, running on R-410A refrigerant . Our technicians quickly secured the area before performing a series of tests:

  • Checking the power supply and the external electronic card;

  • Condenser fan inspection (abnormal noise reported by customer);

  • Measurement of refrigerant pressures ;

  • Compressor and Inverter module start control.

The results revealed that the outdoor fan motor was showing signs of advanced wear, causing significant imbalance and vibration. This type of failure can not only reduce system efficiency, but also cause overload on the main board if the problem is ignored.

Motor Replacement and Unit Realignment

Our technicians replaced the fan motor with a genuine Fujitsu part compatible with the Halcyon series, ensuring the performance and longevity of the system.

Here are the steps of the intervention:

  1. Power cut-off and safe disconnection of the inverter module;

  2. Removal of the old motor and complete cleaning of the ventilation grille;

  3. Installation of the new dynamically balanced engine ;

  4. Application of an anti-corrosion treatment on the fixings and mounting bracket;

  5. Readjustment of the position of the condenser on its wooden supports and insulating foam to reduce vibrations;

  6. Complete reboot test and performance measurement after repair.

Result: a quiet and efficient heat pump

After restarting, the Fujitsu system operated quietly and without vibration . Temperature readings showed stable performance, with a difference of more than 18°C ​​between the intake and exhaust air—proof of optimal energy efficiency .

The customer, satisfied with the rapid return to normal, also appreciated our recommendations for extending the life of his system.

AirGreen Maintenance Tips for a Fujitsu Heat Pump

To avoid costly repairs or unplanned downtime, our experts recommend some best practices:

  • Clean the internal filters at least every six weeks;

  • Visually inspect the outdoor condenser at each change of season;

  • Check the fixings and supports (especially on flat roofs where vibrations are amplified);

  • Schedule annual preventative maintenance , including cleaning coils and checking refrigerant levels.

AirGreen expertise serving Montrealers

Every AirGreen intervention is carried out with the same rigor and attention to detail, whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore . Our technicians are fully familiar with the specific features of Fujitsu Halcyon systems, as well as brands such as Gree, Sharp, Hitachi, Midea, Goodman or Bosch .

In Rosemont as elsewhere, our mission remains the same: to ensure the lasting comfort of our customers and the maximum performance of their HVAC systems, even in the most demanding conditions.

Are you hearing an unusual noise or noticing a drop in performance from your wall-mounted heat pump?
Call AirGreen , HVAC repair specialists in Montreal and the Greater Montreal area. A fast, certified, and passionate team, ready to bring your system back to life.