When a simple noise reveals a deeper problem
At AirGreen , we regularly receive service calls for Fujitsu wall-mounted air conditioners , renowned for their reliability. This time, our team went to Outremont , in the heart of Montreal, to diagnose an unusual noise coming from a unit installed in a charming apartment in a typical building in the neighborhood.
The customer explained to us that, for the past few days, his Fujitsu wall-mounted air conditioner had been producing a regular clicking noise every time it was turned on, accompanied by a slight decrease in the flow of cold air. These signs, although discreet, possibly indicated mechanical wear or an internal ventilation problem .
Diagnosis: a noise that speaks volumes
Upon arrival, we conducted a thorough inspection of the indoor wall unit . At first glance, the unit appeared clean and well-maintained. However, upon removing the faceplate, we quickly identified a buildup of dust on the evaporator fins , combined with a partial misalignment of the tangential fan (often caused by prolonged vibration).
We also found that:
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The fan motor made a slight rubbing noise.
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The dirty fan wheel was unbalancing the rotation.
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The air filter had not been cleaned in several months, reducing airflow and forcing the engine to work harder.
These factors, combined, were enough to cause the regular metallic noise reported by the customer.
AirGreen intervention: precision and deep cleaning
To restore the air conditioner's performance, our technicians undertook a series of methodical actions:
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Complete disassembly of the inner casing to access the turbine and the engine.
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Professional cleaning of evaporator fins with a biodegradable solution specially designed for HVAC systems.
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Extraction of the tangential fan to remove any traces of dirt and rebalance the wheel.
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Lubrication of motor bearings and checking of electrical voltage.
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Cleaning the condensate drain to avoid frequent water backups during periods of high humidity.
Once the unit was reassembled and turned back on, the noise was gone. The cold air flow was smooth and quiet again, just like it was originally.
AirGreen Tips to Prevent Summer Blackouts
This Outremont case reminds us of the importance of preventive maintenance for wall-mounted air conditioners before each summer. Annual cleaning by a certified technician allows you to:
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Maintain the energy performance of the system.
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Prevent mechanical noises related to dirt and imbalances.
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Extend engine and turbine life .
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Reduce electricity consumption and operating costs.
At AirGreen, we also recommend that owners:
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Clean the air filters every 4 to 6 weeks during the warm season.
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Avoid obstructing the air outlet with furniture or curtains.
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Schedule professional maintenance before the start of summer to ensure the system is operating at peak efficiency.
Result: comfort and silence restored
After our intervention, the customer was able to enjoy a comfortable and peaceful indoor climate again, without any unwanted noise. The cooling efficiency was measured at 100% of the nominal output, confirming that the motor and evaporator were operating optimally.
This type of service call perfectly illustrates the value of our AirGreen approach: in-depth technical expertise , combined with personalized and transparent service . Each diagnosis is based on precise measurements and rigorous procedures, guaranteeing the durability and reliability of the HVAC systems installed in Montreal, Laval, Longueuil and on both shores.
AirGreen: your HVAC partner in Montreal and throughout the metropolitan area
Whether it's a Fujitsu wall-mounted air conditioner , a Gree multi-zone system , a Sharp heat pump , or a Goodman central unit , we respond quickly and efficiently. Every repair is carried out using genuine parts and protocols that comply with manufacturer standards.
With our expertise, your HVAC system remains quiet, efficient and durable , summer and winter.