When an unexpected breakdown disrupts the comfort of a room
At AirGreen , we often receive urgent service calls when heating, ventilation, and air conditioning (HVAC) systems fail at critical times. This is exactly what happened recently in a quiet Pointe-Claire residence, where a Sharp wall-mounted heat pump suddenly stopped working in a master bedroom, depriving the occupants of the thermal comfort they were accustomed to.
The wall unit, installed above the bed, showed obvious signs of malfunction: complete failure of the front panel , lack of ventilation , and abnormal noise coming from the evaporator. The front cover had already been partially removed by the customer, revealing significant fouling of the coils and an accumulation of dust on the tangential fan .
Accurate diagnosis: between electronics and neglected maintenance
Upon our arrival, our certified technician carried out a complete inspection of the unit:
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Checking the power supply and circuit breaker;
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Continuity test on the control board;
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Measurement of the fan motor supply voltage;
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Visual inspection of the heat exchanger and sensors.
The diagnosis revealed a faulty circuit board —likely damaged by a voltage fluctuation—as well as a distinct lack of seasonal maintenance . The clogged coils prevented adequate heat exchange, forcing the system to overheat and trigger an automatic protection.
Steps for repair and complete refurbishment
To restore the system to optimal operation, our team followed a rigorous approach:
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Replacement of the main electronic board (original Sharp control module).
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Thoroughly clean the evaporator using a non-corrosive biodegradable cleaner.
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Degreasing and disinfection of the tangential fan to remove stuck residue.
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Cleaning the condensate tray and checking the drain to prevent any water leaks.
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Complete functional test including heating and cooling cycles.
Once these steps were completed, the heat pump resumed normal operation. The blown air was at the correct temperature, the ventilation was smooth, and no abnormal noise was audible.
The results: restored comfort and improved energy efficiency
Thanks to this intervention, the client not only found immediate comfort in his room, but he also noticed a reduction in noise and better energy efficiency .
Indeed, regular HVAC system maintenance—cleaning coils, checking electrical connections, and maintaining internal components—helps extend the life of the unit while avoiding costly repairs.
At AirGreen, we always recommend annual maintenance for wall-mounted heat pumps , particularly before high-use seasons (summer and winter).
AirGreen Expertise: The Difference of Meticulous Service
Our team of specialized technicians operates in Montreal, Laval, Longueuil, on the North Shore and the South Shore , always with the same rigor and the same passion for a job well done. Whether it's for a simple cleaning, an electronic card failure, a defective compressor or a condensate problem, we ensure a quick diagnosis, a lasting repair and courteous service .
In Pointe-Claire, as elsewhere, we know that every HVAC system tells a story: that of daily comfort. And our mission at AirGreen is to preserve it.