Effective intervention for a Gree outdoor wall unit on a brick wall
At AirGreen , we are regularly asked to work on Gree wall-mounted heat pumps installed in typical single-family homes on the South Shore of Montreal , such as here in Sainte-Julie . These compact systems offer excellent performance, but their performance depends heavily on precise installation and rigorous maintenance.
Background to the call
The customer contacted us after noticing an unusual noise coming from their Gree outdoor unit, accompanied by a drop in air conditioning performance . The system, a Gree Pular 12,000 BTU model, was securely mounted on a galvanized wall bracket approximately two meters above the ground, exposed to direct afternoon sunlight. Despite regular maintenance, the customer had been noticing excessive vibration during startup and a slowdown in airflow for several days.
On-site diagnosis
Our technicians carried out a complete inspection, following AirGreen protocols:
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Checking the wall support and anchors : no cracks or misalignment, but presence of a slight vibration transmitted to the brick wall , amplified by resonance.
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Fan and motor inspection : Dust accumulation and minor blade imbalance , causing noise.
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Refrigerant charge check : stable, no leaks detected.
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Electrical inspection : wiring intact, circuit breaker in good condition, but capacitor slightly weakened .
Through these observations, we determined that the root cause of the problem was an aging capacitor , combined with a fan imbalance .
Repair Steps
The intervention was carried out the same day, according to the following steps:
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Replacement of the starting capacitor with an original Gree model of the same capacity (35 µF).
→ This component is crucial for smooth engine starting, especially on hot days. -
Complete cleaning of the fan and balancing of the blades .
→ We used a compressed air cleaning kit and checked the alignment using a handheld vibration sensor. -
Added anti-vibration pads under the wall brackets.
→ These dense rubber parts significantly reduce noise transmission to the wall structure. -
Final check of pressures and start cycle .
→ The heat pump has returned to smooth, quiet and stable operation , with a blowing temperature in line with factory specifications.
Results and customer satisfaction
Upon restarting, the customer immediately noticed the disappearance of the metallic noise and improved circulation of fresh air throughout his home. Thanks to the reliability of Gree parts and our technical expertise, we were able to restore the system's performance without costly replacement.
The customer, relieved to avoid a complete unit replacement, opted for AirGreen annual preventive maintenance to extend the life of his heat pump.
AirGreen Tips for Gree Wall-Mounted Heat Pump Owners
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Clean the internal filters every two months during the summer season.
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Check the stability of the wall bracket after winter, as freezing and thawing can loosen the anchors.
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Have the capacitor inspected every 3 to 5 years , especially on units exposed to direct sunlight.
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Avoid vibrations : slight rocking of the support can cause cracks in the brick or plaster in the long term.
An exemplary repair by AirGreen
This repair in Sainte-Julie illustrates the importance of a rigorous and preventive approach in the field of residential HVAC service . At AirGreen, we always favor sustainable solutions , original parts and methodical intervention , in order to guarantee our customers on the South Shore , Montreal and Laval constant comfort, summer and winter.