Home » Some of Our Service Calls in Greater Montreal » Fujitsu wall-mounted air conditioner repair in Côte-des-Neiges
Réparation d’un climatiseur mural Fujitsu à Côte-des-Neiges
Reading time: 4'

Fujitsu wall-mounted air conditioner repair in Côte-des-Neiges

Rapid diagnosis and AirGreen intervention on an overheating Fujitsu system

At AirGreen , our team of HVAC specialists works daily in the greater Montreal area to ensure the comfort of our customers. This time, our team traveled to Côte-des-Neiges , to a typical Montreal apartment equipped with a Fujitsu wall-mounted air conditioner . The customer contacted us because the unit was blowing lukewarm air, even in maximum cooling mode, while the outside temperature exceeded 28°C.

Symptom observed: lukewarm air and no cooling

Upon arrival, we noticed that the Fujitsu system displayed the “Operation” light on, but produced an airflow around 10.7°C at the outlet of the interior grille—a temperature well below the expected performance for this model. By measuring with an infrared thermometer, we confirmed that the temperature delta between the air inlet and outlet was not sufficient for an optimal air conditioning cycle.

Symptoms reported by the client:

  • Ambient air remains warm despite prolonged operation of the air conditioner.

  • Indoor unit slightly noisy on startup.

  • “Timer” light flashing intermittently.

In-depth diagnosis: a lack of refrigerant

Our technician began a series of tests to identify the cause of the problem:

  1. Visual inspection of the air filters and evaporator: slight accumulation of dust, but nothing abnormal.

  2. Pressure measurement at the outdoor unit: values ​​lower than Fujitsu specifications.

  3. Leak test using an electronic detector: presence of a micro-leak on the flare connection of the suction pipe.

This leak perfectly explained the system's reduced performance. The loss of refrigerant gas resulted in pressure too low to ensure adequate condensation, which limited the air conditioner's ability to produce cold air.

Repair carried out: tightening, brazing and complete recharging

To correct the situation, our technician took the following steps:

  • Tightening and re-tightening of the flare joint after complete cleaning of the fitting.

  • Seal brazing to eliminate any future loss of refrigerant.

  • Complete vacuuming of the circuit to remove residual moisture.

  • Recharge R410A gas according to the exact charge prescribed by Fujitsu.

  • Final performance test with airflow and delta T measurement.

After the intervention, the infrared thermometer now indicated 6.1°C at the air outlet , confirming optimal performance. The customer immediately noticed the difference: the air was cooler, the compressor ran more quietly, and the ambient temperature dropped by 3°C in less than 15 minutes.

Result: comfort regained and efficiency restored

Thanks to this targeted repair , the Fujitsu unit has regained its full energy performance.
We also advised the client:

  • To clean the filters every four weeks during the summer season.

  • To schedule annual preventive maintenance , including checking the refrigerant charge.

  • Avoid using the “Dry” function continuously, which can increase the pressure on the compressor on very hot days.

This intervention clearly illustrates the rigor and precision of AirGreen , both in the diagnosis and in the recommissioning of HVAC systems.
Our Fujitsu certified technicians not only ensure repair, but also the durability of the system, guaranteeing optimal cooling for the most demanding Montreal summers .

Why choose AirGreen for your Fujitsu system?

  • Fujitsu certified expertise : ongoing training on recent and older models.

  • Rapid interventions throughout Montreal, Laval, Longueuil, the North Shore and the South Shore.

  • Professional diagnostic tools (digital pressure gauges, leak detectors, infrared thermography).

  • Warranty on labor and replaced parts .

  • Human, transparent and efficient customer service.

HVAC service that meets AirGreen standards

Every service call is an opportunity for us to demonstrate our commitment to quality, performance and customer satisfaction .
Whether it's a Fujitsu wall-mounted air conditioner , a multi-zone heat pump , or any other HVAC system, our experts ensure optimal operation — regardless of the brand or the technical challenge.

If you notice a drop in performance, flashing lights, or lukewarm air, don't wait for the problem to get worse :
Do like this Côte-des-Neiges customer and call AirGreen today for a quick inspection and lasting repair.

AirGreen — Your trusted HVAC expert in Montreal, Laval, Longueuil, on the North Shore and the South Shore.