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 .
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:
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A clogged filter partially obstructing the heat exchanger;
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A slight accumulation of dust on the turbine ;
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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.
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:
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Correct start-up of the outdoor compressor ;
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Adequate air flow at the turbine outlet;
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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.
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:
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Costly refrigerant leaks ;
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Electronic card failures due to overheating;
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And excessive electricity consumption linked to poor air circulation.
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 .
Why choose AirGreen for your HVAC repairs?
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Certified and trained technicians on all major brands (Midea, Fujitsu, Gree, Sharp, etc.)
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Genuine parts available quickly in Montreal, Laval, Longueuil, North Shore and South Shore
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Transparent service, precise diagnosis, lasting intervention