Rapid diagnosis in the middle of Montreal winter
At AirGreen , our technicians are often called upon to intervene even in the depths of winter, when a wall-mounted air conditioner plays a crucial role in the comfort of a well-insulated home. This was the case for this service call in the Rosemont–La Petite-Patrie neighborhood of Montreal, where a customer reported a complete shutdown of their Gree unit installed above a patio door leading to a snow-covered terrace.
Despite the cold weather, many residents use their wall-mounted units in heating mode (heat pump) . In this specific case, the Gree system was operating as a reversible heat pump, but suddenly refused to restart after a defrost cycle.
Accurate inspection and diagnosis
Upon our arrival, we carried out the basic checks:
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Supply voltage : 240 V compliant.
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Remote control and control sensors : working correctly.
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Electronic board indicator light : flashing indicating an error code “E6”, typical of a communication problem between the indoor and outdoor units.
After removing the top cover of the wall unit, our technician confirmed that the indoor communication board showed signs of moisture and corrosion, possibly caused by condensation infiltration from the poorly insulated drain pipe.
On-site repair
We have proceeded to:
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A complete cleaning of the electronic card , followed by drying and application of anti-corrosion protection.
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Re-insulation of the condensate pipe , in order to prevent moisture from returning.
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Replacement of the 4-core communication wire , whose outer sheath was cracked, probably due to frost.
Once these corrections were made, we restarted the system: the outdoor unit immediately resumed operation, the fan started, and the supply temperature rose to 41°C in less than 3 minutes.
Result: restored comfort and guaranteed durability
The client regained the thermal comfort of his home, and above all, the reliability of his Gree appliance. Before our departure, we:
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Checked refrigerant pressure ; no leaks detected.
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Cleaned the internal filters.
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Performed a defrost mode calibration to optimize low temperature performance.
We also advised the customer to perform annual preventative maintenance , particularly in the fall, to prevent dust and frost from building up on the outdoor unit.
AirGreen expertise: reliability and rigor in every intervention
Every repair carried out by our team is documented and monitored according to a rigorous protocol. At AirGreen, we don't just "repair": we diagnose, correct, and prevent . Thanks to our advanced diagnostic tools, our in-depth knowledge of brands like Gree, Midea, Fujitsu, Sharp and Bosch , and our field experience in Montreal, Laval, Longueuil and the North and South Shores, we ensure a lasting and efficient intervention.
This repair in Rosemont demonstrates the importance of a qualified technical service , capable of intervening quickly even in winter. AirGreen's expertise is based on three pillars:
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Transparency : a clear and justified diagnosis.
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Performance : Repairs that restore original performance.
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Peace of mind : complete monitoring and a satisfaction guarantee.
AirGreen – Your HVAC partner in Montreal and the greater metropolitan area.
Fast service, accurate diagnosis, comfort restored.