Sudden power outage in a condo in Town of Mount Royal
During a recent service call in Ville Mont-Royal , our AirGreen team was asked to work on a Fujitsu wall-mounted air conditioner that was no longer blowing cold air. The customer, a long-time resident, reported that the unit, although turned on, was no longer responding correctly to remote control commands and was emitting a slight clicking noise upon startup. This type of failure, common on units more than ten years old, requires a thorough diagnosis to avoid making the situation worse.
Complete diagnosis: from electronics to mechanics
Upon arrival, we began by checking the power supply and the communication circuit between the indoor unit and the outdoor condenser. The voltage was stable, which immediately ruled out a power outage. We then opened the front panel of the wall-mounted unit, revealing a completely clogged filter and an air exchanger covered in dust , severely restricting airflow.
However, the main problem stemmed from a faulty start capacitor in the electronic module, which was responsible for the observed clicking noise. This component, essential for starting the fan motor, was showing advanced wear.
Unit repair and refurbishment
Our technicians performed a complete capacitor replacement as well as a complete internal cleaning of the unit, including:
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Degreasing of the exchanger and the tangential fan.
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Disinfection of the condensate tray.
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Replacing the air filter.
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Checking the pipe joints to ensure there were no refrigerant leaks.
The performance test carried out after restarting confirmed impeccable operation: blowing temperature at 8°C, smooth ventilation and no abnormal vibrations.
Result: comfort and efficiency restored
In less than two hours, the customer's comfort was restored. Their Fujitsu wall-mounted air conditioner was working like new again, with optimal energy efficiency. We also took the time to explain good maintenance practices to the customer, including:
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Clean the filters every two months.
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Avoid using the appliance at outdoor temperatures below 5°C (for non-heat pump models).
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Schedule an annual preventive inspection to extend the life of the system.
AirGreen Expertise: precise and sustainable interventions
At AirGreen , we handle every HVAC service call with rigor and transparency. Whether it's a simple lack of maintenance or a complex electronic failure, our priority remains the same: quickly restoring thermal comfort while ensuring the system's durability .
Our technicians, all certified by the RBQ and the CCQ , operate throughout Greater Montreal , whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore . Thanks to a complete inventory of parts compatible with major brands such as Fujitsu, Gree, Midea, Sharp and Lennox , we can carry out the majority of repairs during the first visit.
When to call AirGreen?
We recommend contacting a professional as soon as abnormal signs appear:
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Cold air absent or intermittent.
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Water leak under the unit.
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Unusual noise when starting.
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Flashing lights on the display panel.
Prompt intervention often prevents costly breakdowns while maintaining the system's energy efficiency.
A lasting relationship of trust
The client from Ville Mont-Royal particularly appreciated the speed of our response and the clarity of our diagnosis . Following this repair, he chose to subscribe to our annual AirGreen maintenance program , which includes a complete cleaning, inspection of electrical components and verification of refrigerant pressures.
By focusing on preventative maintenance, it now guarantees the reliability and performance of its Fujitsu wall-mounted air conditioner for several years.