Rapid intervention for a heat pump in distress
At AirGreen , we regularly receive calls from customers whose wall-mounted heat pump is showing signs of weakness, often when they need it most. This was recently the case in the Saint-Laurent district of Montreal, where a co-owner of a red brick building contacted us about a sudden breakdown of his Midea heat pump .
The outdoor unit, installed on a metal stand near a large window, would no longer start and would make a clicking noise when turned on. Inside, the air blown was no longer cool, despite the remote control's normal settings. A typical situation, but one that often hides a more complex diagnosis.
Precise and methodical diagnosis
Upon our arrival, our technician performed a complete inspection of the HVAC system . After securing the power line and checking the voltage at the circuit breaker, he found that the compressor was trying to start without success .
The checks made it possible to quickly identify two anomalies:
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The starting capacitor showed signs of advanced wear.
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A buildup of dust and debris was partially obstructing the condenser, reducing the unit's heat exchange capacity.
These two elements combined were enough to prevent the heat pump from functioning properly, especially on warmer days when the cooling demand is high.
Step by step repair
1. Replacing the faulty capacitor
We removed the original Midea capacitor , tested its capacity and confirmed a loss of more than 40% of its nominal value. A new 45 µF capacitor compatible with the model was installed, ensuring stable restart of the compressor.
2. Complete cleaning of the outdoor condenser
Using a biodegradable cleaner and a low-pressure water jet, we carefully cleaned the condenser fins , removing all the dirt and dust that has accumulated over the seasons. This cleaning is crucial to maintain energy efficiency and prevent the compressor from overheating.
3. Checking electrical connections and refrigeration lines
Once the part was replaced and cleaned, our technician inspected the electrical connections and R-32 refrigerant hoses . No leaks or traces of oil were observed. The unit was then powered back up for a full functional test .
Results and performance restored
Upon restart, the heat pump restarted normally. The compressor started without any abnormal noise, and the flow of cold air inside returned to its usual intensity. Temperature measurements confirmed a difference of 9°C between the incoming and outgoing air , a sign of an efficient system.
The client, reassured, appreciated our transparency on each step and the preventive maintenance advice that we shared.
AirGreen Tips to Extend the Life of Your Midea Heat Pump
We took advantage of this intervention to remind our client of some good practices, which we recommend to all owners of Midea systems or other brands:
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Clean the internal filters regularly (every 4 to 6 weeks during periods of intensive use).
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Have electrical connections and refrigerant pressures checked by a certified technician annually.
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Avoid obstructions around the outdoor condenser (leaves, branches, objects).
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Protect the unit during the winter with a breathable cover to limit corrosion.
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Schedule a complete annual maintenance before each summer to ensure optimal performance.
AirGreen Expertise: Trusted by Montrealers
For several years, AirGreen has established itself as a benchmark in HVAC system repair in Montreal, Laval, Longueuil, on the North Shore and the South Shore . Our technicians, trained on brands such as Midea, Gree, Fujitsu, Sharp, Bosch and Comfortmaker , master the most complex diagnostics, whether it is an electrical failure, a refrigerant leak or an electronic card failure .
What sets our team apart is our human and rigorous approach: each intervention is documented, tested, and validated in the field. We never leave a site without ensuring that the system is working perfectly and that the client understands the recommendations to avoid any recurrence.
In conclusion
This Midea heat pump repair in Saint-Laurent perfectly illustrates the importance of regular maintenance and rapid diagnosis when a problem arises. Thanks to our intervention, the client regained the comfort and energy efficiency of their system, while extending the lifespan of their equipment.
At AirGreen, we know that a well-maintained heat pump not only provides consistent comfort, but also substantial energy savings throughout the year.