Accurate diagnosis and rapid intervention: a service by AirGreen
At AirGreen , we operate every day throughout the greater Montreal area to ensure the comfort and peace of mind of our customers. This time, our technical team went to Ville Mont-Royal , to a residence equipped with a Sharp wall-mounted heat pump , for a service call that perfectly illustrates our rigor and our know-how in HVAC repair .
The context of the intervention
The customer contacted us after noticing a significant drop in the performance of their heat pump: the blown air was lukewarm, even in cooling mode. As always, our team scheduled an appointment promptly, specifying a two-hour arrival window to ensure timely and organized service.
Upon our arrival, the technician performed a temperature check at the outlet of the indoor unit using a professional infrared thermometer , a crucial step in establishing the correct diagnosis. The screen displayed a temperature of approximately 10.4 °C , which confirmed that the unit was not cooling sufficiently compared to ambient conditions.
Problem analysis
There are several causes that can explain a lack of performance on a Sharp heat pump :
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An R-32 refrigerant leak , common in systems subject to vibration or loose connections.
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Clogging of the internal coil , which reduces heat exchange.
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An interior fan clogged with dust.
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Or, a defective temperature sensor , distorting the electronic regulation.
After removing the front cover and inspecting the coils and filters, our technician quickly ruled out dirt as a cause: the customer's maintenance was impeccable. The diagnosis then turned to the refrigerant level , which needed to be checked carefully.
Leak detection and confirmation
Using an electronic leak detector and foam soap , we located a microleak on the flare connection of the suction hose, probably caused by insufficient tightening during a previous installation.
Even a small leak is enough to reduce the pressure in the circuit, leading to a drop in thermal efficiency and an increase in the compressor cycle time .
Repair: rigor and precision
Here are the main steps of our intervention:
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Recovery of residual refrigerant using an approved station, in accordance with environmental standards.
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Tightening and re-brazing of the flare connection, followed by a leak test under nitrogen at 350 psi .
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Complete vacuuming of the system , ensuring the evacuation of all humidity.
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Recharge the circuit with R-32 refrigerant according to the exact quantity recommended by Sharp (measured in grams).
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Restart and validate performance .
At the end of the process, a new temperature reading was taken: the air was now coming out at 6.1°C , confirming that the system was once again operating optimally.
Results and customer satisfaction
After repair, the Sharp heat pump regained its full capacity to cool efficiently, even on the hot days of Montreal's summer.
The customer was able to immediately notice the difference: restored thermal comfort , normal energy consumption , and a reduction in operating noise .
Our AirGreen approach
Every repair carried out by our team is based on three pillars:
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Transparency : We explain each step to the customer, without unnecessary jargon.
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Technical precision : Our technicians follow manufacturer standards and use the latest tools.
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Durability : We ensure that the repair extends the useful life of the device, without compromising on efficiency.
Our certified technicians work on all brands of wall-mounted heat pumps : Sharp , Fujitsu , Gree , Midea , Goodman , Zephyr , Lennox , Bosch , and many others. Whether in Laval , Longueuil , on the North Shore or the South Shore , our mission remains the same: to offer sustainable and efficient solutions to each customer.
Prevention and advice
To avoid this type of breakdown happening again, we recommend:
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Complete annual maintenance carried out by an AirGreen technician, including cleaning the coils, checking the pressures and the blowing temperature.
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Checking copper connections and flare joints at each visit.
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Replace the internal filter every three months during the summer period.
These simple actions can significantly extend the lifespan of the appliance and maintain optimal energy performance.
Conclusion
This intervention in Ville Mont-Royal demonstrates the importance of professional diagnosis and regular maintenance on residential HVAC systems.
At AirGreen , we view every repair as an opportunity to restore comfort and build customer confidence. Our expertise in Sharp wall-mounted heat pump repair makes us a partner of choice throughout the greater Montreal area.