A rapid and effective intervention by AirGreen
As part of our residential HVAC repair services, our team was recently called to Sainte-Thérèse, on the North Shore of Montreal , to work on a Gree wall-mounted heat pump installed on the rear facade of a single-family home. The customer contacted us after noticing that the outdoor unit had been making an unusual noise and that the heating seemed to be underperforming for several days.
Our mission: to diagnose the cause of this loss of performance and restore the system to full efficiency, while minimizing interruptions to customer comfort.
On-site inspection: first assessment of the system
Upon our arrival, our technician performed a complete visual inspection of the Gree outdoor condenser. The unit was securely mounted on a galvanized steel wall bracket, protected from impact and protected from the ground by a bed of decorative stones. A well-designed installation, typical of projects carried out by AirGreen or according to our recommendations.
However, the noise reported by the customer was indeed present: a cyclical rumble was heard each time the compressor started. This type of sound is often associated with excessive mechanical vibration or an unbalanced fan .
Detailed diagnosis: a structured approach
Our technicians always follow a rigorous methodology to identify the exact cause of the problem. Here are the key steps of the diagnosis:
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Electrical check : check of the dedicated circuit breaker, inspection of the power wiring and continuity test.
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Mechanical Inspection : Examination of the condenser fan, blades and motor.
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Refrigeration circuit analysis : measurement of pressures and temperatures to check the R-32 refrigerant charge.
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Listening with a thermal stethoscope : technique for isolating the source of the noise (compressor, fixings, conduits).
Measurements quickly revealed a vibration transmitted by the metal brackets to the brick wall. In addition, a minor fan imbalance accentuated the noise phenomenon. Performance-wise, the refrigeration circuit pressure was slightly below Gree specifications, indicating a small refrigerant leak at the liquid line connection.
Repair: Complete restoration of performance and silence
Once the diagnosis was confirmed, our team undertook the complete repair of the Gree heat pump:
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Replaced the fan with a factory-balanced original model.
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Tightening and damping of wall fixings , with the addition of rubber anti-vibration pads.
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Search and sealing of the micro-leak detected on the liquid line connection, followed by a leak test under nitrogen pressure.
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Recharge R-32 refrigerant according to the quantity prescribed by the manufacturer.
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Complete performance test in heating and cooling modes.
After these interventions, the Gree unit returned to quiet and stable operation . The compressor started smoothly, and the observed pressures were in line with the nominal values.
Result: comfort and efficiency restored
The customer immediately noticed the difference. The noise level of the outdoor unit had decreased by more than 50%, and the indoor temperature quickly stabilized again. The heat pump, which had initially lost power, regained its optimal energy efficiency .
We also performed a check of the indoor module , to ensure that the coils and filters were clean, ensuring smooth airflow and consistent performance.
AirGreen Tips for Maintaining Your Gree Heat Pump
Regular maintenance remains the best way to avoid recurring breakdowns and performance declines. Here are our technicians' recommendations:
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Clean the internal filters every 4 to 6 weeks.
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Visually inspect the outdoor condenser each season to remove leaves, dust or debris.
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Schedule an annual professional maintenance , including checking the refrigerant charge, electrical connections and defrosting.
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Monitor for abnormal noises : An unusual sound is often the first sign of a mechanical problem.
These simple actions guarantee a longer lifespan for your Gree heat pump and maintain optimal energy efficiency , even in very cold weather.
AirGreen: Your Trusted HVAC Expert on the North Shore
This intervention in Sainte-Thérèse perfectly illustrates our approach: precise diagnosis, lasting repair and total transparency . At AirGreen, each service call is treated with the same rigor, whether it is a Gree, Fujitsu , Midea or Daikin residential system .
Our teams cover all of Greater Montreal , including Laval, Longueuil, the North Shore and the South Shore , with fast, courteous and certified service. Our goal: to offer each customer the best interior comfort , in all seasons.
Conclusion: expertise, reliability and peace of mind
Thanks to this repair, our client's Gree wall-mounted heat pump in Sainte-Thérèse has become as quiet as it is efficient. This intervention once again demonstrates the quality of AirGreen's expertise , based on technical precision, attention to detail and respect for our customers' comfort.