A service call in the heat of summer
When a Brossard client contacted us about a Sanyo wall-mounted heat pump that was no longer cooling adequately, our AirGreen team immediately scheduled an on-site visit. During a heatwave, a breakdown of this type can quickly compromise the comfort of a home or small business.
The outdoor unit, installed on the flat roof of a residential building, was operating intermittently, producing a blast of warm air inside. The customer also reported a metallic noise before each compressor shutdown.
Sanyo R410A System In-Depth Diagnostics
Our certified technicians first performed a pressure check of the R410A refrigerant , finding a suction pressure that was much too low, a sign of a potential leak.
A visual inspection of the condenser and copper pipe connections revealed traces of oil on a loose flare joint. This detail, often imperceptible to the untrained eye, perfectly explained the observed loss of efficiency.
We also performed an electrical check of the compressor and fan, confirming that both components were still fully functional. The electronic board, for its part, showed no anomalies or signs of overheating.
Repair steps: leak detection and full recharge
Once the leak is identified, we have:
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Replaced the flare fitting and re-soldered with silver flux to ensure a perfect seal.
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Performed a nitrogen leak test to ensure no other leaks were present.
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Performed a complete vacuum of the system for 45 minutes , to remove all traces of moisture.
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Recharged the system with R410A refrigerant according to the charge recommended by Sanyo.
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Checked the proper functioning of the heat pump over several complete cycles.
The result was immediate: a blowing temperature of 11°C in the indoor wall unit and an ambient temperature dropping to 22°C after one hour of continuous operation.
The importance of preventive maintenance on wall-mounted heat pumps
This type of breakdown is typical of installations that have not received regular maintenance. Refrigerant leaks , often minimal at first, can lead to:
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A drop in energy efficiency.
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A risk of compressor overheating.
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Short cycles are detrimental to the sustainability of the system.
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An increase in electricity consumption.
At AirGreen , we recommend our customers have their HVAC systems inspected once a year , especially before peak seasons (summer and winter). This helps prevent costly repairs and extends the life of the units.
AirGreen Expertise: a clean and guaranteed intervention
Our team not only repaired the leak, but also took the time to revise the mounting bracket for the Sanyo outdoor unit, which was mounted on slightly sagging wooden blocks. We adjusted the height and replaced anti-vibration pads to reduce noise transmission into the structure.
Each step was documented, and the client received a detailed report including:
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the initial diagnosis,
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before/after pressures,
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the exact amount of refrigerant added,
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and maintenance recommendations.
Our intervention concluded with a complete performance test, ensuring stable temperature and optimal performance .
AirGreen: your HVAC partner in Brossard and throughout Greater Montreal
Thanks to our know-how and experience with all the major brands — Sanyo, Fujitsu, Midea, Sharp, Gree, Goodman, Zephyr, Trane , and many others — we provide fast and lasting interventions throughout Greater Montreal: Brossard, Longueuil, Laval, the North Shore and the South Shore .
Our commitment: to provide a professional, transparent and efficient service to guarantee peace of mind for our residential and commercial customers.
AirGreen is the perfect combination of technical expertise, compliance with environmental standards and local human service .
In Brossard, this repair of a Sanyo wall-mounted heat pump demonstrates once again that a rigorous diagnosis and meticulous intervention make all the difference.