Accurate diagnosis thanks to infrared thermometry
At AirGreen , our team of HVAC technicians prides itself on combining expertise and technological precision. During this service call in Pointe-Claire , our client contacted us after noticing that their Midea wall-mounted heat pump was no longer maintaining a stable temperature, despite seemingly normal operation.
To understand the source of the problem, our technician used an infrared thermometer to measure the temperature of surrounding surfaces and the airflow produced by the unit. This tool allows you to quickly identify temperature fluctuations and confirm whether the unit is cooling or heating efficiently.
In the photo above, we can see the measurement taken on the wall near the indoor unit: a stable temperature around 22.3°C , a sign that the system was working, but with reduced efficiency.
Step 1: Check the airflow and refrigeration circuit
The first observation was a warm airflow in air conditioning mode , indicating a possible loss of pressure in the refrigeration circuit. Our technician then:
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Measured the pressures of R-32 refrigerant ,
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Inspected the flare fittings for micro-leaks,
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Checked the operation of the interior fan and turbine motor .
The readings quickly confirmed a slight refrigerant leak at the external connection , probably due to prolonged vibration.
Step 2: Repair the leak and recharge the refrigerant
After locating the leak, we:
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Cleaned and tightened the fittings with tools calibrated to the torque recommended by Midea.
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Conducted a leak test with pressurized nitrogen.
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Performed a complete vacuum of the circuit to eliminate all traces of humidity.
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Recharged the system with the exact amount of R-32 according to the manufacturer's specifications.
This rigorous process helps preserve the heat pump's energy efficiency while extending its lifespan.
Step 3: Checking thermal efficiency
Once the repair was completed, a new test with the infrared thermometer showed a temperature difference of 10°C between the blown air and the ambient air , a sign of restored performance.
The customer immediately noticed that the room was comfortable again in less than ten minutes .
Our technicians also have:
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Cleaned the air filter ,
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Checked the flow rate of the condensate drain ,
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Inspected the electronic board to ensure stable operation.
Step 4: Tips and Preventive Maintenance
Before leaving the premises, we recommended to our client:
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To clean the filters every month during the hot season,
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To carry out a complete annual inspection including checking the refrigerant and coil,
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Avoid obstructing the outdoor unit with plants or decorative objects.
At AirGreen, we believe that prevention is the key to lasting comfort and stable energy bills, especially in a climate as variable as that of the Montreal region.
Local, fast and professional service in Pointe-Claire
This intervention perfectly illustrates our approach: precise diagnosis, lasting repair and complete transparency . Whether in Montreal, Laval, Longueuil, on the North Shore or the South Shore , our mobile teams intervene quickly for any repair of Midea wall-mounted heat pumps or other recognized brands such as Fujitsu, Sharp, Gree, Trane or Bosch .
Thanks to our expertise and the use of professional tools such as infrared thermometry , we ensure rapid restoration of comfort for our residential and commercial customers.
In summary:
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Initial problem: Midea heat pump no longer cooling efficiently.
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Cause: Micro-leak of R-32 refrigerant at the external connection.
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Solution: repair, leak test, full recharge.
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Result: optimal performance restored and comfort restored.
AirGreen – Experts in wall-mounted HVAC system repair in Pointe-Claire and throughout Greater Montreal.