Repair of a Midea wall-mounted air conditioner in Sainte-Julie

A typical service call: loss of performance in the middle of summer

At AirGreen , we regularly receive calls from customers on the South Shore experiencing a sudden drop in the performance of their wall-mounted air conditioner. This is precisely the case with this intervention in Sainte-Julie , where a homeowner contacted us after noticing that his wall-mounted Midea unit was no longer effectively cooling the upper floor of his house.

After a quick exchange with our technical department, a diagnostic appointment was scheduled for the same day. Our team went on site to conduct a complete inspection of the HVAC system .

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Diagnosis: Airflow obstruction and faulty thermal sensor

Upon our arrival, we noticed that the indoor unit, installed high up in a small corridor, seemed to be running continuously without reaching the required temperature . Initial checks revealed:

• A clogged filter partially obstructing the heat exchanger;

• A slight accumulation of dust on the turbine ;

• And, more critically, a faulty thermal sensor distorting the ambient temperature reading.

Through our diagnostic protocol, we confirmed that the sensor needed to be replaced to restore temperature control accuracy.

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Intervention: complete cleaning and component replacement

Once the unit was powered down, our technician partially dismantled the front panel , followed by a complete cleaning of the internal coil . The filters were washed and dried thoroughly before being replaced.

The original Midea thermal sensor was then replaced with a new part supplied directly from our central warehouse in Montreal. Once the repair was completed, we launched a full calibration test to verify:

• Correct start-up of the outdoor compressor ;

• Adequate air flow at the turbine outlet;

• And the stability of the set temperature after 20 minutes of continuous operation.

Result: flawless operation and a room temperature lowered by 3°C in less than a quarter of an hour.

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AirGreen Expertise: Beyond Simple Repair

Each intervention is an opportunity for us to validate the overall performance of the HVAC system . In this specific case, we also inspected the condensate drain , cleaned the drain hatch , and checked the refrigerant pressure at the outdoor unit.

This preventive approach often helps to avoid:

• Costly refrigerant leaks ;

• Electronic card failures due to overheating;

• And excessive electricity consumption linked to poor air circulation.

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Conclusion: restored comfort and optimal efficiency

Thanks to our rapid intervention in Sainte-Julie , the client was able to regain perfect comfort in his home, even during a week of intense heat.
The Midea unit now operates quietly and efficiently , with optimized energy consumption.

At AirGreen , every repair aims not only to restore operation , but also to extend the life of the HVAC system .

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Why choose AirGreen for your HVAC repairs?

• Certified and trained technicians on all major brands (Midea, Fujitsu, Gree, Sharp, etc.)

• Genuine parts available quickly in Montreal, Laval, Longueuil, North Shore and South Shore

• Transparent service, precise diagnosis, lasting intervention