Cooling failure quickly taken care of by AirGreen
At AirGreen , our teams work weekly on Sharp wall-mounted heat pump systems , which are very popular in modern homes on the North Shore of Montreal. These units are distinguished by their energy efficiency and sleek design, but like any heating, ventilation and air conditioning (HVAC) system, they require rigorous maintenance to maintain their performance.
It was in Boisbriand , in a typical single-family home on the North Shore, that we were recently called for a cooling problem on a Sharp wall unit. The customer had noticed that the blown air was no longer cold despite a temperature set to 18°C and maintenance performed the previous year.
On-site diagnosis: temperatures and pressures under monitoring
Our technician first took the air outlet temperature using a precision infrared thermometer , which displayed 12.2°C , while the room was at 25°C. This temperature difference was insufficient for proper operation in air conditioning mode.
Early hypotheses included:
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abnormal R32 refrigerant pressure (leak or overfilling),
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fouling of the internal coil ,
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or a failure of the indoor unit temperature sensor .
After performing a complete inspection of the system , including measuring the manifold pressure, checking the current drawn by the compressor, and checking the filter, our technician noticed a slight refrigerant leak on the external service valve.
Repair the leak and recharge with R32
The intervention took place in several stages:
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Locating the leak using an electronic detector.
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Brazing and tightening of the service valve to ensure a perfect seal.
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Complete vacuuming of the refrigeration circuit to eliminate residual humidity.
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Recharge the system with R32 , according to the manufacturer's specifications Sharp.
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Final performance test , including temperature and operating pressure control.
At the end of the process, the blowing temperature dropped from 12.2°C to 7.8°C , confirming the return to normal performance.
Immediate results and satisfied customer
After the repair, the house was comfortable again in less than an hour. The unit operated quietly, without odor or vibration, and the room temperature quickly dropped to 21°C.
Our technician took advantage of his presence to check the condensate drain and clean the filters , two simple but often neglected operations that can prevent future breakdowns.
The client particularly appreciated our transparent approach: each step of the diagnosis was explained to him in real time, and a complete maintenance report was left on site for his file.
The Importance of Regular Maintenance on Sharp Heat Pumps
Although Sharp systems are renowned for their durability, they require annual maintenance to maintain their energy efficiency. Preventative maintenance includes:
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Cleaning of the interior and exterior coil ;
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Checking electrical connections ;
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R32 refrigerant control ;
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Drain and fan inspection ;
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Temperature test and calibration of sensors .
These checks not only help prevent efficiency losses, but also increase the life of the compressor — the most expensive part to replace.
AirGreen expertise on the North Shore and across Greater Montreal
Our certified technicians work daily on the North Shore (Boisbriand, Blainville, Terrebonne, Rosemère, Sainte-Thérèse) , but also in Montreal, Laval, Longueuil, and on the South Shore .
At AirGreen, each intervention follows a rigorous protocol:
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Complete diagnosis before intervention ;
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Exclusive use of original parts ;
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Documentation of measurements before and after repair ;
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Personalized maintenance advice for the customer.
This professionalism allows us to ensure lasting repairs , while reducing the energy consumption of our customers' HVAC systems.
In summary
This Sharp wall-mounted heat pump repair in Boisbriand perfectly illustrates the precision and expertise of AirGreen technicians. Thanks to rapid leak detection , careful brazing and a calibrated R32 recharge , we restored optimal comfort and energy efficiency to this residence.
At AirGreen, our commitment is simple: to offer each client a sustainable, transparent and professional solution , whether for the repair, maintenance or installation of HVAC systems across Greater Montreal.