When summer comfort runs out: our rapid intervention in Saint-Constant
At AirGreen , we know that a reliable wall-mounted air conditioner is essential for tackling hot summer days in Quebec. Recently, our team traveled to Saint-Constant , on Montreal's South Shore , to help a customer whose Chigo wall-mounted air conditioner had stopped working after several years of regular service.
The call was prompted by a sudden breakdown: the indoor unit was no longer blowing cold air, although the unit appeared to be turning on normally. The customer explained that the problem had gradually worsened over the week—a classic occurrence in breakdowns linked to a lack of maintenance or a faulty refrigeration circuit.
Diagnosis: a compressor that goes into safety mode
Upon our arrival, our certified technicians carried out a series of checks:
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R410A refrigerant pressure inspection.
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Checking the operation of the indoor fan .
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Testing the temperature sensors.
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Examination of wiring and electronic boards.
We quickly noticed that the outdoor compressor would go into safety mode a few seconds after switching on. This indicated an anomaly in the refrigerant pressure , often caused by a micro-leak or a clogged coil.
Further inspection confirmed a partial loss of refrigerant due to a worn gasket on a copper connection—a common failure on Chigo models installed for more than 8 to 10 years.
Repair: precision and reliability at the heart of our approach
Our specialists have carried out:
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Accurate leak detection using an electronic detector.
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Repairing the joint and tightening the copper line.
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Complete vacuuming of the system to eliminate all traces of moisture.
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Recharging R410A refrigerant according to factory specifications.
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The complete performance test of the compressor and fan.
After these interventions, the unit regained stable pressure and a constant flow of cold air. We also cleaned the air filter and checked the proper flow of the condensate drain , often overlooked but essential for the proper functioning of any wall-mounted HVAC system.
Result: restored comfort and improved efficiency
In less than two hours, our customer's Chigo wall-mounted air conditioner was fully operational again. Cool air circulated evenly throughout the room, and the outdoor compressor operated without abnormal noise or overheating.
We took advantage of this visit to explain to the client some good preventive maintenance practices :
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Clean the filters every two months during the summer.
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Avoid setting the temperature too low continuously (ideal: 23–24°C).
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Schedule a complete annual inspection by a qualified technician.
These simple tips will extend the life of your air conditioner while reducing energy consumption.
What this call illustrates
This intervention in Saint-Constant demonstrates a common reality: even a reputable brand like Chigo requires rigorous technical monitoring over the years. Small, often invisible leaks can significantly reduce system performance before a complete breakdown occurs.
With our HVAC expertise and advanced diagnostic equipment, we were able to quickly restore customer comfort while ensuring optimal energy efficiency.
Why choose AirGreen for your wall-mounted air conditioner repair?
At AirGreen , we don't just repair: we analyze, optimize, and prevent future breakdowns. Our technicians serve all of Greater Montreal , including Montreal, Laval, Longueuil, the North Shore, and the South Shore , with fast and transparent interventions.
Our commitments:
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Accurate and honest diagnosis from the first visit.
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Original replacement parts and compliant guarantees.
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Dedicated after-sales service to ensure the reliability of every repair.
An AirGreen service, a lasting difference
Each repair is an opportunity for us to demonstrate our expertise, but above all our passion for the lasting comfort of Quebec homes. Whether it's for a heat pump , a wall-mounted air conditioner , or a central system , we always apply the same rigor and attention to detail.
For any air conditioning or heating problem, AirGreen remains your trusted partner — on the South Shore , in Saint-Constant , and throughout Greater Montreal .