Fujitsu wall-mounted air conditioner repair in Côte Saint-Luc

A quick and efficient service call for restored comfort

At AirGreen , we know that a broken wall-mounted air conditioner can quickly turn a pleasant day into a source of frustration—especially in tight spaces or spaces with limited airflow, such as stairwells. This is exactly the situation we faced during this service call in Côte Saint-Luc , where a Fujitsu wall-mounted air conditioner had stopped effectively cooling the landing of a single-family residence.

The context of the intervention

The unit, installed halfway up a central staircase, served both the upper corridor and the ground floor. This type of location is common for maximizing air distribution, but it often complicates maintenance. The client reported a noticeable decrease in cold airflow , accompanied by a slight clicking noise each time the compressor started.

Our team of technicians quickly arrived on site to perform a complete diagnosis of the system.

Detailed diagnosis

As soon as we switched on, we noticed that:

• The indoor fan was running, but the airflow remained low.

• The compressor was turning on intermittently.

• A buildup of dust and micro-debris was clogging the filter and evaporator fins.

• The refrigerant pipes showed slight abnormal condensation, indicating a possible imbalance in the refrigerant charge.

These symptoms pointed the diagnosis towards a partial lack of refrigerant (probably R-410A) and insufficient maintenance of the indoor module.

The steps of repair

1. Complete cleaning of the indoor unit

   • Disassembly of the hood and removal of the filters.

   • Application of AirGreen biodegradable cleaner to remove dirt accumulated on the evaporator.

   • Low pressure rinse to avoid damaging the aluminum fins.

2. Inspection of the refrigeration circuit

   • Static and dynamic pressure test of the circuit.

   • Checking the flare fittings and the insulating sleeve.

   • Detection of a micro-leak at the expansion connection .

3. System repair and reload

   • Localized welding of the leaking connection.

   • Complete vacuum draw for 20 minutes.

   • Recharge the system to the exact amount recommended by Fujitsu.

4. Final check

   • Blowing temperature measurement: 9.8°C (perfect for optimal operation).

   • Automatic defrost cycle control.

   • Observation of a regular and quiet air flow.

Result: comfort and efficiency restored

Once the repair was completed, the difference was immediate: the customer noticed uniform cooling throughout the stairwell, without excessive noise or sudden compressor shutdowns. The energy efficiency of the unit was also optimized, which will result in a reduction in electricity consumption .

AirGreen Tips to Extend the Life of a Wall-Mounted Air Conditioner

• Clean your filters every two months during the summer season.

• Schedule annual preventative maintenance , ideally before the first heat wave.

• Ensure good air circulation around the indoor unit (do not block the flow with furniture or curtains).

• Watch for unusual noises : these are often the first signs of mechanical or pressure imbalance.

AirGreen expertise at your service

This intervention in Côte Saint-Luc perfectly illustrates our approach: diagnose accurately, intervene effectively and prevent future breakdowns . At AirGreen, each service call is an opportunity to demonstrate our expertise in repairing residential HVAC systems , whether it is heat pumps , wall-mounted air conditioners or multi-zone systems .

We serve the entire Greater Montreal area daily, including Laval , Longueuil , the North Shore and the South Shore , always with the same rigor and the same passion for lasting comfort.