A quick and accurate diagnosis for an air conditioning breakdown
At AirGreen, we often receive urgent calls during periods of intense heat, when residential air conditioning systems suddenly stop working. This was the case for a family from Chomedey, Laval , who contacted us after noticing that their Gree wall-mounted heat pump was no longer blowing cold air, despite a warning light on the indoor unit.
Initial inspection and diagnosis
Upon arrival, we noticed that the wall-mounted unit, installed in the main hallway of the house, appeared clean and well-maintained. However, the display showed an intermittent error code , and the outdoor compressor would not start. Our technicians immediately began a series of checks:
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Testing the communication signal between the indoor unit and the outdoor compressor: no response from the outdoor unit.
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Measurement of the electrical voltage from the indoor unit: correct power supply.
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Checking the electronic board : presence of a damaged capacitor on the main board.
On-site repair
After explaining the situation to the customer, we replaced the indoor control board and performed a complete system reset . The compressor restarted immediately, and the heat pump began blowing constant cool air at 22°C .
We also took the time to:
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Clean the air filters ;
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Check the level of R32 refrigerant , which is perfectly stable;
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Ensure that the condensate drain was clear, preventing any internal water leakage.
Result: restored comfort and optimized performance
In less than an hour, the house was back to a comfortable temperature. The customer expressed his satisfaction, happy to avoid a complete replacement. We recommended that he perform annual preventive maintenance before the summer season to extend the life of his unit.
What we learned from this intervention
This type of failure, often linked to a faulty electronic board , is common on first-generation Gree wall units . Good ventilation of the case and regular maintenance help prevent components from overheating.
At AirGreen , our team of RBQ and CCQ certified technicians responds quickly in Montreal, Laval, Longueuil, on the North Shore and the South Shore to diagnose and repair any type of residential or commercial HVAC system problem.
Why trust AirGreen for your HVAC repairs?
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Certified and trained technicians on all brands : Gree, Midea, Sharp, Fujitsu, Bosch, Lennox, etc.
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Fast and transparent service , with a clear quote before any repair.
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Warranty on parts and labor .
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Available 7 days a week , in emergencies or by appointment.
At AirGreen, your comfort is our priority.
A well-maintained wall-mounted heat pump can last more than 15 years , provided it receives the proper care: cleaning, electrical inspection, and sensor calibration. We support our customers throughout the lifecycle of their system—from installation to maintenance, including one-off repairs like the one in Chomedey.
AirGreen – Heat Pumps, Air Conditioning and Heating in Montreal, Laval, Longueuil, South Shore and North Shore.