A meticulous intervention for a complete interview
At AirGreen , we know that a high-performance wall-mounted air conditioner is essential for home comfort, especially on humid days on the North Shore. Our team came to a quiet semi-detached house in the Sainte-Dorothée neighborhood of Laval for in-depth maintenance on a Fujitsu wall-mounted system , whose performance had been declining for several weeks.
The customer had noticed a drop in efficiency and a slight water leak under the indoor unit. These signs, often underestimated, sometimes mask severe fouling of the system, particularly in the evaporator and condensate drain.
Diagnosis: Dirt buildup and drain obstruction
Upon arrival, we performed a complete system diagnostic . The filters were saturated, the evaporator was covered in dust and light mold, and the drain hose had a partial obstruction caused by limescale and debris buildup. These conditions are typical when the unit has not been thoroughly cleaned for several seasons.
Our technicians then checked the R-32 refrigerant gas pressure and the condition of the electronic board. No refrigerant leaks were detected, which confirmed that the main cause of the failure was the lack of regular maintenance .
Step 1: Preparation and protection of the premises
Before any cleaning operation, we installed a professional blue cleaning tarp specially designed for the wall units. This device protects the walls and floor while directing rinse water and residue to a secure drain.
This step, often overlooked by less experienced technicians, ensures clean and safe maintenance , without splashing or risk of damaging interior surfaces.
Step 2: Deep cleaning the evaporator
Using a specialized biodegradable HVAC cleaner, we sprayed the entire evaporator coil, fins, and crossflow fan. This process helps dissolve dirt, grease, and biofilms that have accumulated over the months.
The use of controlled pressurized water then removed the residue, restoring the unit's optimal airflow. This meticulous cleaning significantly improves energy efficiency and reduces electricity consumption by up to 15%.
Step 3: Unblocking and disinfecting the condensate drain
The observed stagnant water came from the partially clogged drain . After dismantling it, we removed the accumulated deposits and then carried out a thorough flush with a disinfectant specific to HVAC ducts.
This treatment prevents unpleasant odors, prevents the formation of mold and guarantees smooth drainage of condensates , especially during periods of high summer humidity.
Step 4: Recommissioning and final testing
Once the cleaning was complete, we reinstalled the previously washed and dried filters, then carried out a series of tests:
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Measurement of air flow at the unit outlet;
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Checking the blowing temperature (10°C difference with ambient air);
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Drainage control during the cooling cycle;
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Analysis of the noise level of the indoor fan.
The results were perfect: the Fujitsu wall-mounted air conditioner regained its full power, operating quietly and efficiently.
Result: comfort restored and device extended
The customer immediately noticed improved airflow and reduced noise . In addition to improved comfort, this comprehensive maintenance extends the life of the unit and reduces the risk of breakdowns during summer heat waves.
We also recommended annual preventative maintenance , ideally in the spring, to maintain system performance while meeting Fujitsu manufacturer's warranty standards.
AirGreen expertise at your service
At AirGreen, we combine technical expertise, rigor, and transparency for every service. Our certified technicians are trained on wall-mounted systems from brands like Fujitsu, Gree, Midea, Sharp, and Mitsubishi , and are experts in the deep cleaning protocols tailored to each model.
Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our priority is always the same: to restore the performance and reliability of your HVAC unit while ensuring the cleanliness and safety of your interior.
Good to know: signs that maintenance is necessary
A wall-mounted air conditioner needs maintenance when you notice:
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Reduced airflow ;
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Unpleasant odors when lighting;
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A water leak under the indoor unit;
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Unusual clicking or vibration ;
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An increase in the electricity bill for no apparent reason.
Ignoring these symptoms can lead to premature motor wear, reduced compressor efficiency, or even a short circuit due to moisture.
Conclusion
This Fujitsu wall-mounted air conditioner repair in Sainte-Dorothée perfectly illustrates the importance of regular, professional maintenance. Through a methodical approach and the use of specialized equipment, we restored a system that was losing its efficiency while ensuring a healthy and comfortable indoor environment.
At AirGreen , we ensure that every customer enjoys clean air and optimal comfort, summer and winter.