Home » Some of Our Service Calls in Greater Montreal » Repair of a Midea central heat pump in Ville Saint-Laurent
Réparation d’une thermopompe centrale Midea à Ville Saint-Laurent
Reading time: 4'

Repair of a Midea central heat pump in Ville Saint-Laurent

When a power outage jeopardizes a family's comfort

At AirGreen , we are often called upon to intervene quickly when an HVAC system breaks down at the most unexpected moment. This is exactly what happened in Ville Saint-Laurent , in a duplex where a Midea central heat pump had suddenly stopped working after a short circuit. The client, worried about being without air conditioning during the hot summer days, contacted our team for an urgent repair .

Precise on-site diagnosis: identify the cause of a complex breakdown

Upon arrival, our certified technician noticed that the outdoor condenser was no longer turning on. The unit, although new, was showing signs of an internal electrical problem . After performing voltage and continuity checks, we identified a burnt-out starter relay on the main control board.
This type of failure is often caused by:

  • a temporary surge in the electrical network,

  • premature aging of the relay,

  • or even a ground fault .

To confirm the diagnosis, we used our nitrogen cylinder to perform a pressure test and ensure there were no refrigerant leaks—a crucial step before returning the compressor to service. The pressure and amperage readings confirmed that the compressor, although inactive, was in good condition.

Repair steps: rigor and safety above all

  1. Complete power cut to the unit to ensure safety.

  2. Removal of the faulty starter relay and visual inspection of the electronic board.

  3. Cleaning the electrical terminals to prevent any oxidation or contact resistance.

  4. Replacement of the relay with a genuine Midea part, ensuring compatibility and durability.

  5. Reconnect and tighten cables according to manufacturer's specifications.

  6. Soft start test accompanied by voltage and current measurements to validate the correct operation of the compressor.

During the recommissioning, the technician also took the opportunity to check the R-32 refrigerant charge , a more environmentally friendly and efficient fluid used on this generation of Midea heat pumps.

Results: restored comfort and optimized performance

After the repair, the heat pump restarted perfectly . The compressor started up without delay, the evaporation temperature was stable and the indoor airflow reached the set point again.
The customer immediately felt the difference: a uniform circulation of fresh air , without temperature variations or abnormal noise.

We also took advantage of this visit to:

  • clean the external coils to improve heat exchange,

  • check the tightness of the electrical connections in the panel,

  • and schedule semi-annual preventive maintenance , ensuring the longevity of the system.

What we learned from this intervention

This repair is a good example of how regular maintenance can prevent major breakdowns. A simple annual check-up can:

  • detect signs of wear on electrical components,

  • stabilize the charge with refrigerant,

  • and avoid sudden breakdowns in high season.

At AirGreen , we pride ourselves on providing transparent and documented services. Each repair is accompanied by a detailed report , before/after photos, and personalized recommendations to optimize the performance of your HVAC system.

A trusted team for all of Greater Montreal

Our central heat pump repair service is available in Montreal, Laval, Longueuil, on the North Shore and the South Shore .
Whether your unit is a Midea, Fujitsu, Gree, Lennox or Trane , our technicians are proficient in each model and always work to the highest standards in the HVAC industry.

We know that a breakdown can quickly become a comfort or even safety issue. This is why AirGreen is committed to:

  • intervene quickly,

  • diagnose accurately,

  • and guarantee a sustainable and professional service .

Conclusion: an exemplary repair in Ville Saint-Laurent

Thanks to our expertise, this Ville Saint-Laurent family regained comfort and peace of mind, while avoiding a costly compressor breakdown.
Once again, this intervention demonstrates our commitment to providing reliable, technical and human HVAC service in the heart of Greater Montreal.

Keywords : Midea central heat pump repair, HVAC service Ville Saint-Laurent, heat pump maintenance Montreal, HVAC technician Laval, AirGreen Rive Nord Rive Sud.