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Réparation d’une thermopompe Midea à Saint-Laurent
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Midea heat pump repair in Saint-Laurent

When a heat pump runs out of steam in the middle of summer

At AirGreen , we often receive urgent calls during periods of intense heat in Montreal and the surrounding neighborhoods. This was recently the case in Saint-Laurent , where a client living in a condo building contacted us: his Midea heat pump was no longer cooling his home properly, despite maintenance performed less than a year ago. The outdoor unit, installed on a galvanized steel balcony support , appeared to be in good condition. Only superficially.

Diagnosis: fouling and progressive loss of efficiency

Upon our arrival, our technician performed a complete inspection of the HVAC system . We noticed:

  • A buildup of dust and pollen on the coil of the outdoor unit.

  • Slightly twisted fins , reducing airflow.

  • An abnormal noise coming from the fan.

  • And above all, an abnormally low pressure of the R-32 refrigerant, indicating a possible microleak.

Using our digital diagnostic tools, we confirmed that it was indeed a slow leak at the suction line connection , likely caused by slight vibrations accumulated over time.

Careful repair and performance refurbishment

To get the Midea heat pump back in top shape, our team took the following steps:

  1. Safe recovery of R-32 refrigerant according to environmental standards.

  2. Repair of the defective connection using high temperature brazing.

  3. Nitrogen leak test to ensure complete circuit integrity.

  4. Complete cleaning of the coil and straightening of the fins .

  5. Recharges the system with the precise amount of R-32 refrigerant , calibrated to optimize energy performance.

  6. Final check of pressures, temperatures and electrical currents .

Result: restored performance and comfort regained

As soon as I restarted, the difference was noticeable:

  • The air blown inside was 9°C colder than before the intervention .

  • The noise level of the compressor and fan has been significantly reduced.

  • The customer noticed an immediate reduction in interior temperature and increased system stability .

We also gave him some maintenance tips:

  • Clean the internal filter and the external condenser regularly.

  • Avoid covering the heat pump during the summer season.

  • Schedule an annual AirGreen inspection to prevent microleaks and ensure compressor longevity.

AirGreen expertise: reliability, precision and transparency

This type of intervention perfectly illustrates our approach:
At AirGreen , every heat pump repair is approached with technical rigor, transparency, and attention to detail. We work on all popular brands in Quebec — Midea, Fujitsu, Gree, Sharp, Goodman, Lennox , among others—offering fast service across Montreal, Laval, Longueuil, the North Shore, and the South Shore .

In this case, the Midea heat pump was restored to its original performance without requiring a complete compressor replacement, saving the customer several hundred dollars.

A typical intervention by our HVAC technicians in Saint-Laurent

This repair in Saint-Laurent demonstrates how a proper diagnosis can make all the difference. On the surface, a loss of power seemed trivial, but the underlying cause—a micro-refrigerant leak —could have led to a major failure if it hadn't been detected in time. Thanks to our methodical approach, the system was able to be put back into service the same day , ensuring the customer's comfort returned quickly.

Why trust AirGreen

  • Fast, local service throughout Greater Montreal.

  • Certified residential and commercial HVAC technicians .

  • Advanced diagnostic tools to detect problems before they escalate.

  • Compliance with environmental standards for handling refrigerants.

  • Warranty on repairs carried out .

AirGreen is more than a service: it's the promise of lasting comfort and trusted expertise in the heart of Greater Montreal.