Accurate diagnosis and efficient repair at height
At AirGreen , we are often called upon for delicate interventions requiring expertise, precision, and safety. Recently, our team repaired a Sharp wall-mounted heat pump on a residential building in Sainte-Thérèse , on Montreal's North Shore . The outdoor unit, installed several meters above the ground, had a partial heating failure—a challenge we met with the rigor and expertise that characterize our certified technicians.
Context and initial findings
The customer contacted us after noticing that their heat pump was no longer producing enough heat, despite recent maintenance by another contractor. Symptoms:
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Warm air temperature in heating mode.
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Defrost cycle too frequent.
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Slight oil leak detectable under the compressor.
Upon arrival, our technicians secured the area and installed the aerial work platform to access the outdoor unit mounted high on a brick wall. The Sharp brand, known for its stable performance, is robust, but like any HVAC unit, it requires professional maintenance when signs of failure appear.
Stages of technical diagnosis
Once the device was accessible, we carried out a complete inspection:
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R410A refrigerant pressure check : reading indicated partially undercharge.
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Visual inspection and electronic leak detector test : leak located at a slightly loose flare fitting .
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Condenser fan analysis : correct operation, no imbalance.
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Electronic control board check : test OK, no overheating detected.
System Repair and Recovery
We have :
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Tightened and resealed the flare fitting with a new ring and suitable sealing paste.
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Completely vacuum the circuit to remove all moisture.
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Recharged the system to the manufacturer's rated pressure.
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Checked the performance under load in heating mode and in cooling mode.
After 25 minutes of operation, the performance had returned to optimal: the air temperature at the interior outlet reached 46°C , proof of efficient heat transfer.
AirGreen Safety and Know-How
Working at height requires not only good technical knowledge, but also a perfect mastery of safety protocols. Our technicians, trained for this type of intervention, systematically use:
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CSA approved harnesses,
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Regularly inspected nacelles,
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Insulated tools suitable for high voltage HVAC systems.
This combination of technical expertise and safety rigor ensures the reliability of each intervention, even in the most demanding conditions.
Results and customer satisfaction
Once the repair was completed, we let the unit run continuously for several cycles to validate the system's stability. The customer immediately noticed a noticeable improvement in interior comfort and a reduction in operating noise .
He was also given some tips to optimize the durability of his Sharp system:
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Clean the internal filters regularly.
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Avoid obstructing outside air circulation.
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Schedule annual preventative maintenance before winter.
AirGreen expertise serving Quebec comfort
Each intervention on a wall-mounted heat pump is unique, but our mission remains constant: to guarantee lasting comfort and maximum energy efficiency to our customers throughout Montreal, Laval, on the North Shore and the South Shore .
Thanks to our extensive experience with brands such as Sharp, Midea, Fujitsu, Gree, and Lennox , we are able to quickly identify the real causes of a breakdown, provide lasting solutions, and provide the necessary follow-up to prevent recurrences.
When to call AirGreen
A wall-mounted heat pump that:
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No longer heats properly,
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Frost frequently,
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Has an oil or refrigerant leak,
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Makes an unusual noise,
...requires rapid intervention. At AirGreen , our teams move quickly to diagnose and repair any type of residential or commercial HVAC system , using modern tools and original manufacturer parts.
In conclusion
This Sharp heat pump repair in Sainte-Thérèse perfectly illustrates our approach: technical precision, safe intervention, and guaranteed results. Each service call is treated as a priority, because the comfort of our customers is at the heart of our mission .