A typical service call where precision makes all the difference
At AirGreen , we know that a high-performance wall-mounted heat pump is essential for maintaining consistent comfort in a home, especially during hot summer days or the transition periods of spring and fall. This project, carried out in Sainte-Dorothée (Laval) , perfectly illustrates the importance of an accurate diagnosis and rapid intervention to prevent small symptoms from becoming real breakdowns.
Context of the intervention
Our customer contacted us after noticing that their Midea heat pump seemed less efficient than usual. The blown air was lukewarm, and the room temperature wouldn't drop below 23°C despite a 20°C setting on the remote control. This was a clear sign that a thermal imbalance or inefficient cooling system could be the cause.
Upon our arrival, our technician performed a complete evaluation of the HVAC system , including the discharge temperature, refrigerant gas pressure, and coil cleanliness.
Step 1: Checking the actual blowing temperature
Using a professional infrared thermometer , our technician took several measurements at different air outlet points. As seen in the photo, the measured temperature was approximately 20.9°C , which is far too high for an optimal cooling cycle.
Under normal conditions, a well-maintained Midea wall-mounted heat pump should blow air around 10 to 12°C when the air conditioning mode is active and the room temperature is at 23°C.
Step 2: In-depth diagnosis
After checking the air filter (which turned out to be clean), we opened the front panel to inspect the coils and turbine. A slight dust deposit on the fins was detected, which partially reduced the airflow and heat exchange capacity .
Next, the technician connected his digital pressure gauges to check the pressure of the R-32 refrigerant circuit. The observed values indicated a slightly lower than normal charge , which confirmed a partial lack of refrigerant probably caused by a microleak.
Step 3: Repair and Upgrade
Once the diagnosis is confirmed, we have:
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Locate the microleak using an electronic gas detector around the copper connections.
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Cleaned and tightened the affected fitting, before carrying out a brief recharge with R-32 .
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Checked the system for leaks with nitrogen to confirm no new leaks.
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Restarted the unit and resumed thermal measurements: the blowing temperature dropped to 11.3°C in less than 5 minutes.
Step 4: Operational optimization and advice
We took advantage of the intervention to carry out a preventive cleaning of the indoor coil and the centrifugal fan. This not only improves energy efficiency, but also extends the life of the heat pump .
The client also received our advice on:
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The importance of cleaning filters every 3 to 4 weeks.
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The advantage of an annual professional interview before summer and before winter.
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Local grants available in Laval for the maintenance and modernization of energy-efficient HVAC systems.
Result: comfort restored and efficiency restored
A few minutes after the recharge was complete, the house returned to a pleasant and stable temperature. The customer immediately noticed the difference in airflow and the noticeable cooler feeling in the room. Our infrared thermometer now displayed a reading that was perfectly in line with Midea's performance standards.
AirGreen expertise: rigor and precision
This type of intervention clearly demonstrates the added value of a professional service : it is not just a matter of “getting a machine back up and running”, but of restoring optimal performance while guaranteeing the long-term reliability of the system.
At AirGreen, we service all makes and models of wall-mounted heat pumps: Midea, Gree, Fujitsu, Sharp, Goodman, Lennox, Bosch , and many more. Each service is performed according to a strict protocol, combining high-precision measuring instruments, technical expertise, and attentive customer service.
Intervention carried out in Sainte-Dorothée, Laval
Located on the North Shore of Montreal , Sainte-Dorothée is a residential area where we regularly carry out HVAC maintenance and repairs . The homes often feature modern wall-mounted units installed high up, perfect for Midea or Gree R32 heat pump systems, known for their energy efficiency.
Our AirGreen team serves Montreal, Laval, Longueuil, the North Shore and the South Shore daily, guaranteeing fast, reliable and professional service.
In summary :
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Unit Type: Midea Wall-Mounted Heat Pump (R32)
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Location: Sainte-Dorothée, Laval
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Problem: Blown air too hot, reduced efficiency
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Diagnosis: Low refrigerant charge + slight fouling
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Solution: Recharge with R32, clean, tighten the fittings
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Result: Blowing temperature restored to 11°C, optimal comfort
At AirGreen , we combine technology, rigor, and local expertise to deliver HVAC repair services that exceed expectations. Whether in Laval, Montreal, Longueuil, or elsewhere in the greater metropolitan area, our certified technicians are ready to get your system back in tip-top shape.