Fujitsu wall-mounted air conditioner repair in Saint-Laurent

When a wall-mounted air conditioner stops blowing well: a typical service call in Montreal

At AirGreen , we regularly receive calls for Fujitsu wall-mounted air conditioners that appear to be working but whose cooling output drops or whose indoor unit is slightly leaking . This was precisely the case for this residential customer in Saint-Laurent , on the island of Montreal, who contacted us after noticing water dripping on his doorframe and uneven cooling in his master bedroom .

Diagnosis: A clogged filter and a blocked drain

Upon arrival, our technicians conducted a thorough inspection of the Fujitsu wall unit . The top cover was opened, revealing heavily clogged air filters , a sign of neglected maintenance over several seasons . Underneath, a buildup of moisture and dust indicated a drainage problem .

We then checked:

• The condensate tray , filled with stagnant water;

• The drain pipe , clogged with a mixture of dust and algae;

• The blower turbine , partially blocked, reducing the air flow.

Thanks to these findings, the diagnosis was made quickly: poorly evacuated condensates causing a flow on the wall and reduced performance of the system.

Repair steps and complete cleaning

Our team carried out the following interventions:

1. Removal and complete cleaning of air filters with a biodegradable antibacterial product;

2. Vacuuming and rinsing the condensate tray to eliminate all traces of mold;

3. Unclogging the drain using a pressure cleaning tool;

4. Cleaning the turbine (centrifugal wheel) to restore optimal air flow;

5. Functional test and measurement of the temperature differential , confirming the return to normal performance.

Result: restored comfort and optimized performance

After restarting, the Fujitsu wall-mounted air conditioner regained a powerful and constant airflow , with a stable blowing temperature around 8°C at the outlet . The condensation water flowed correctly through the pipe, and no traces of humidity were visible on the wall.

The customer immediately noticed the difference: the room cooling was uniform , without fluctuations or excessive noise.

Recommendations to prevent this type of breakdown

Our technicians have reminded you of some essential maintenance tips:

• Clean the filters every two months , especially during the summer;

• Check the drain pipe before each hot season;

• Have annual professional maintenance performed to clean the turbine and coils;

• Avoid leaving the air conditioner running in dehumidification mode for extended periods unattended.

These simple actions can prevent leaks, mold growth, and reduced energy efficiency.

A typical intervention by AirGreen

Every service call at AirGreen follows the same philosophy: diagnose quickly, repair sustainably, and advise intelligently . In Saint-Laurent, as throughout Greater Montreal, our certified technicians ensure that each HVAC system is operating at its full potential, whether it's a heat pump, a wall-mounted air conditioner, or a multi-zone system .

Thanks to our experience with Fujitsu systems , we know the specific features of each model – from compact series to high-performance units. This expertise allows us to offer precise, efficient interventions that always comply with the manufacturer's standards.

In summary

A simple, neglected maintenance can turn a high-performance air conditioner into a source of discomfort and damage. AirGreen's rapid response in Saint-Laurent restored the comfort, cleanliness, and energy efficiency of this Fujitsu unit, while preventing a more costly breakdown.

For any wall-mounted air conditioner repair in Montreal, Laval, Longueuil, on the North Shore or the South Shore , AirGreen remains your trusted partner in reliable and durable HVAC solutions .