A quick service call to restore comfort to a residential building
At AirGreen , we were recently called for an urgent HVAC intervention in Sainte-Thérèse , on the North Shore of Montreal . The owner of a small multi-unit building contacted us after noticing that one of the Midea wall-mounted heat pumps was no longer producing cooling, despite the indoor fan operating normally. In a building where multiple electric meters indicate individual installations, it is essential that each unit functions perfectly for the comfort of the occupants.
Initial diagnosis: rapid identification of the cause of the problem
Our certified technician first performed a complete system check . After inspecting the Midea wall-mounted condenser , which was securely mounted on a wall bracket, he noticed an anomaly with the power supply voltage : the compressor was not starting. A check of the circuit breaker and external wiring confirmed that a power cable had suffered damage , probably caused by weather and wear and tear.
In-depth analysis of the electrical system
The site had several independent power lines and electrical meter boxes , typical of a multi-unit building. Using our professional measuring equipment, we were able to isolate the faulty heat pump circuit and confirm that the problem was caused by a loss of voltage at the junction box located under the ducts.
This step is crucial in any wall-mounted heat pump repair service, as unstable voltage or poor contact can damage the condenser's electronic board.
Repair: complete overhaul and functional test
After securing the power supply, our team:
-
Replaced the damaged power cable with wire approved for outdoor HVAC use;
-
Checked the integrity of the control board and the starter relay ;
-
Cleaned the connection terminals and tightened the contacts;
-
Performed a complete test of the compressor and fan;
-
Checked the R410A refrigerant pressure to ensure there were no leaks.
Once the repairs were completed, the Midea heat pump restarted normally, producing a stable and constant flow of cold air.
Result: restored comfort and increased safety
Thanks to this quick and precise intervention , the client was able to avoid a prolonged outage and higher costs. The system is now operating at full capacity, and the electrical stability of the installation has been restored. We also recommended an annual preventive inspection , particularly in buildings with multiple meters, to prevent potential problems related to shared power.
AirGreen expertise: precision, safety and sustainability
At AirGreen, we understand that every service call is unique. In this specific case, our intervention in Sainte-Thérèse demonstrates the importance of meticulous diagnosis and in-depth knowledge of Midea systems . Our certified technicians not only ensure your heat pump is back in optimal operation, but also ensure the electrical safety of your entire installation.
We operate throughout Greater Montreal , whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore .