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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

Precision service from AirGreen for restored performance

At AirGreen , every service call is an opportunity to bring an HVAC system back to life and demonstrate our technical expertise. That day, our team went to the Rosemont–La Petite-Patrie neighborhood of Montreal to work on a Fujitsu wall-mounted heat pump that was no longer adequately cooling our client's home. A common problem, but the exact causes require careful diagnosis.

Initial observation and symptoms reported by the client

The customer contacted us after noticing a gradual decline in performance.
Despite setting the thermostat to 20°C, the indoor temperature remained at 25°C. In addition, the outdoor compressor seemed to be running continuously without producing sufficiently cold air.

Our initial on-site checks revealed several warning signs:

  • The Fujitsu Halcyon outdoor unit had a buildup of dust and debris on the coil.

  • The fan was spinning erratically.

  • A slight oil leak was visible at the liquid side flare fitting.

  • The condensate drain pipe was partially blocked.

These clues pointed to a problem with refrigerant pressure and circulation , possibly caused by a slow leak.

Complete diagnosis: rigor and technology

Our technicians carried out a complete analysis of the refrigeration circuit :

  1. Measuring operating pressures with a digital manifold.

  2. Checking the air flow at the outlet of the indoor unit.

  3. Nitrogen leak test to identify any refrigerant loss.

  4. Electrical inspection of components (capacitor, relay, control board).

The results confirmed:

  • Minimal leakage on the flare fitting on the liquid side.

  • A significant drop in pressure , resulting in reduced thermal efficiency.

  • An imbalance in the R-410A refrigerant charge .

Steps of repair

To restore the performance of the heat pump, our team carried out a series of specific interventions:

  1. Flare fitting repair : removal, cleaning, gasket replacement and tightening with controlled torque.

  2. Complete vacuuming of the system for 45 minutes to eliminate all traces of humidity.

  3. Recharging the refrigeration circuit with the exact quantity of R-410A , according to the specifications of the manufacturer Fujitsu.

  4. Complete cleaning of the outdoor coil to maximize heat exchange.

  5. Operational test and measurement of the blowing temperature: difference of 12°C between the air drawn in and the air blown out, a sign of optimal efficiency.

Results: 100% return to performance

After our intervention, the Fujitsu heat pump regained its original performance.
Operational tests demonstrated:

  • Pressure stabilized at 125 psi on the low side and 360 psi on the high side , perfect values ​​for a summer cooling cycle.

  • An interior temperature dropped from 25°C to 21°C in less than 15 minutes.

  • Quiet and smooth compressor operation .

The customer immediately felt the difference: restored comfort and stabilized energy consumption.

Recommended preventive maintenance

To extend the life of the system and avoid future breakdowns, we have recommended an annual maintenance plan including:

  • Clean the outdoor coil twice a year (spring and fall).

  • Checking the refrigerant charge and flare connections.

  • Cleaning the indoor unit , especially the filter and turbine.

  • Inspection of the condensate drain , often overlooked but essential to prevent overflows and corrosion.

Regular maintenance can maintain up to 25% additional energy efficiency over the life of the system.

AirGreen Expertise: Your Trusted HVAC Partner in Montreal

Our specialized technicians work on all major brands of wall-mounted and central heat pumps: Fujitsu, Gree, Sharp, Midea, Goodman, Trane, Lennox, Zephyr, Bosch , and many others.
Our commitments:

  • Accurate and transparent diagnosis .

  • Original parts or approved equivalents .

  • Written warranty on repair .

  • Fast and professional service , covering all of Montreal, Laval, Longueuil, the North Shore and the South Shore .

Every AirGreen intervention is based on rigor, safety and absolute compliance with the manufacturer's standards.

Conclusion: Fujitsu performance and AirGreen know-how

Thanks to targeted and methodical intervention, the Fujitsu wall-mounted heat pump in Rosemont–La Petite-Patrie is fully operational again.
This operation perfectly illustrates AirGreen's expertise: a fast, careful and sustainable service , which restores each HVAC system to its optimal level of efficiency.