A quick and precise intervention to restore the comfort of a modern home
At AirGreen , we were recently called to Sainte-Dorothée, Laval , for a service call on a GREE wall-mounted heat pump installed on the rear facade of a modern residence. The customer contacted us after noticing that their outdoor unit was producing an abnormal noise and that the indoor temperature was no longer stabilizing, despite regular maintenance.
Initial diagnosis: a compressor under pressure
Upon our arrival, our technician conducted a complete inspection of the GREE system . The outdoor unit, securely mounted on a wall bracket above the concrete slab, showed signs of fouling on the fins and abnormal vibration of the fan.
After checking the R-32 refrigerant pressure, it appeared that the system was experiencing slight overpressure due to a partial blockage of the condenser. This situation can cause the compressor to overheat and, ultimately, significantly reduce its lifespan.
Repair Steps
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Deep cleaning of the condenser :
We removed the front grille and carried out a gentle cleaning with water under controlled pressure, so as not to damage the aluminum fins. -
Fan Check :
The imbalance came from a slight misalignment of the blade, corrected on site by mechanical realignment. -
Refrigeration circuit check :
No leaks were detected, but we adjusted the gas charge to bring the system back to GREE manufacturer specifications. -
Performance test :
After reassembly, we restarted the heat pump and observed a stable cycle with an optimal discharge temperature and a noise level returned to normal.
The result: restored comfort and efficiency
Within minutes of restarting, the house was back to stable thermal comfort. The customer immediately noticed that the GREE heat pump was once again operating quietly and efficiently.
We recommend annual preventative maintenance , especially before the summer period, to avoid fouling of the condenser and to ensure optimal energy performance.
Why so many Laval households choose GREE and AirGreen
GREE wall-mounted heat pumps are highly regarded for their reliability and excellent energy efficiency. However, like any HVAC unit, they require rigorous monitoring. At AirGreen, our team is fully versed in inverter technologies and R-32 systems , allowing us to respond quickly and without guesswork, regardless of the installation configuration.
Our interventions on the North Shore – from Laval to Sainte-Thérèse via Blainville – are based on three commitments:
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In-depth technical expertise on all makes and models;
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A transparent and documented diagnosis , illustrated if necessary with photos of the site;
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Sustainable repairs , focused on long-term system reliability.
Maintenance tips to extend the life of your heat pump
For owners of wall-mounted heat pumps like this one in Sainte-Dorothée, here are some simple steps to take:
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Clean the indoor unit filters every month;
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Avoid the accumulation of dust and leaves around the outdoor condenser;
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Schedule an annual professional interview before extreme seasons;
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Check the condensate drain flow to prevent internal leaks.
An AirGreen service that inspires confidence
Every AirGreen service call is handled with the same rigor and attention to detail. In this case, the GREE unit was refurbished without replacing expensive parts, saving the customer money while maintaining their comfort.
Thanks to our recognized expertise in HVAC system repair in Montreal, Laval, Longueuil and on the North and South Shores, our customers benefit from fast, durable solutions that are always adapted to their needs.