Compressor failure quickly resolved by the AirGreen team
At AirGreen , we are often called for emergencies related to wall-mounted heat pumps that suddenly stop producing cooling or heating, particularly during seasonal changes. Recently, our team intervened in Boisbriand , on the North Shore of Montreal , for a Midea wall-mounted heat pump installed on the side facade of a single-family home. The customer contacted us after noticing that the outdoor unit was no longer starting, although the indoor unit seemed to be operating normally.
First observation: a silent outdoor unit
Upon our arrival, our technician performed a complete visual inspection. The Midea condenser , securely mounted on a wall bracket, appeared intact: no visible traces of oil or corrosion. However, the fan remained motionless and no compressor noise was audible. This symptom immediately pointed our diagnosis towards an electrical problem or a faulty control board .
Detailed diagnosis: the power card in question
Our voltage tests revealed that power was reaching the outdoor unit, but the main board wasn't redistributing the signal to the compressor. A slight burning smell confirmed our hypothesis: the power electronics board was damaged following a power surge, likely caused by a recent thunderstorm.
Repair Steps
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Safe disconnection of the device and opening of the electronics compartment.
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Board inspection : Several components showed signs of overheating.
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Replacement of the power board with an original Midea part, perfectly compatible with the existing model.
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Load start test : after reconnecting, the compressor started normally.
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Refrigerant pressure check : values were correct, no leaks detected.
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Coil cleaning and complete performance testing to ensure optimal performance.
In less than two hours, the Midea heat pump was back to full functionality. The customer immediately noticed a more powerful airflow and a reduction in operating noise , proof that the system was returning to its original balance.
The benefits of a quick and accurate diagnosis
This type of failure could have caused further damage if ignored: a compressor that tries to start without an adequate signal can overheat and deteriorate prematurely. At AirGreen, we always emphasize the importance of prompt intervention and regular maintenance , especially after periods of intense heat or electrical storms.
Preventive maintenance tips:
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Install a surge protector to protect the circuit board.
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Clean the internal filters every month during the active season.
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Visually check the outdoor unit for any abnormal noise or vibration.
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Schedule a complete annual maintenance with an AirGreen certified technician.
Final result: comfort and efficiency restored
By the end of our intervention, the Midea wall-mounted heat pump in Boisbriand was operating at full capacity again. The house regained a stable and comfortable temperature, while reducing electricity consumption.
The customer, reassured by our methodical approach and the clarity of our explanations, chose to add his equipment to our annual AirGreen maintenance program , thus guaranteeing the longevity of his system.
AirGreen — Specialists in repair and maintenance of Midea wall-mounted heat pumps in Boisbriand, Montreal, Laval, Longueuil, North Shore and South Shore.