A typical service call: a heat pump that no longer cools efficiently
At AirGreen , we were recently called about a performance issue with a Zephyr wall-mounted heat pump installed in a single-family home in Sainte-Catherine , on Montreal's South Shore . The customer noticed that the unit was no longer producing cold air, even when the outdoor compressor seemed to be running. With the recent heat waves, the family's indoor comfort was compromised—a situation our team quickly addressed.
Initial inspection: the first clues
Upon arrival, we conducted a thorough inspection of the Zephyr HVAC system , a model known for its good value for money in residential installations. The outdoor unit, securely mounted on wall brackets, was exhibiting noisy operation and slight abnormal vibration.
Inside, the wall-mounted heat pump was displaying an intermittent error code indicating a refrigerant pressure imbalance . This symptom could be caused by:
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A refrigerant leak in the circuit.
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A temperature sensor problem .
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A tired compressor or a faulty capacitor .
Precise diagnosis: measure, test, confirm
Our certified technicians began by checking the R-410A refrigerant pressure . The values were too low for optimal performance. We then performed a leak test using an electronic detector and a foam solution. The leak was coming from an improperly crimped flare fitting at the outdoor compressor outlet.
This slow leak explained the gradual loss of performance observed by the customer over the past few weeks.
Zephyr System Repair and Refurbishment
After isolating the leak area, we have:
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Purged and recovered the remaining refrigerant, in accordance with environmental standards.
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Re-crimp the flare fitting with optimal tightening torque to avoid any micro-leaks.
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Replaced the sealing cap and cleaned the entire condenser.
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Performed a complete vacuum draw of the circuit (500 microns).
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Recharged the system with the exact amount of R-410A refrigerant according to Zephyr specifications.
Once the system was restarted, the pressure stabilized within the nominal values. The wall-mounted unit began to blow constant cool air again, with a discharge temperature of 7°C , confirming the full efficiency of the compressor.
Performance verification and customer advice
Before concluding, we took the time to:
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Clean the internal filters .
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Check the condensate drainage .
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Advise the customer on the importance of annual preventative maintenance , especially before the summer season.
The client immediately noticed an improvement in comfort in the home and a reduction in outside noise .
Another example of AirGreen expertise on the South Shore
This intervention once again demonstrates our team's ability to quickly diagnose and effectively resolve HVAC problems , regardless of the brand or configuration. Zephyr heat pumps , while reliable, require regular maintenance to maintain their optimal performance. At AirGreen, we ensure this follow-up with rigor, professionalism and speed.
Whether you are in Sainte-Catherine , Brossard , Saint-Lambert or La Prairie , our team is always ready to respond to your wall-mounted, central or multi-zone heat pump repair needs.
Why choose AirGreen for your heat pump repairs?
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Certified and trained technicians on all brands (Zephyr, Midea, Fujitsu, Gree, Sharp, etc.).
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Fast and accurate diagnosis thanks to professional measuring tools.
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Transparent service : each step of the repair is explained to the customer.
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Satisfaction guaranteed : our interventions restore comfort and energy efficiency.
Conclusion
Thanks to this quick repair, the Sainte-Catherine family is once again enjoying optimal comfort, while extending the life of their Zephyr heat pump. At AirGreen, every service call is an opportunity to demonstrate our HVAC expertise and our commitment to quality and customer satisfaction .