A customer without heating at the beginning of spring
One cool May morning in Rosemère , on Montreal's North Shore , a customer contacted us about a North Cool wall-mounted heat pump failure . The system, installed on the exterior brick wall of his home, refused to produce heat. The outdoor fan was working, but no warm air was circulating inside. At AirGreen , we know how uncomfortable these failures can be, especially during seasonal transitions in Quebec.
System Inspection: A Hidden Cause Behind Apparent Simplicity
Our technician, Julien , began by inspecting the North Cool outdoor compressor , which was mounted on a wall bracket above a window. The installation was well done, but there were some clues that suggested an internal technical problem.
Here are the steps of the diagnosis:
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Checking the electrical voltage : 240 volts were present at the compressor input.
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Compressor test : Complete silence despite activation of the heat call — likely sign of a faulty start capacitor .
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Visual inspection of connections and wiring : no signs of burning or broken cables.
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Refrigerant charge check (R-410A) : pressure slightly lower than normal, indicating a small leak at the flare connection .
The hypothesis: the start capacitor was no longer providing the necessary current to the compressor, and a slow leak was reducing the overall performance of the system.
Complete repair on site
To avoid an additional trip, Julien carried out a complete repair directly on site :
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Replacement of the starting capacitor with an original North Cool compatible part.
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Tightening and cleaning of the flare connection with addition of R-410A refrigerant at nominal pressure.
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Compressor and fan test : The system resumed its heating cycle immediately.
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Indoor airflow control : stable temperature at 42°C in heating mode, perfect for this time of year.
Within 90 minutes, the North Cool heat pump was back operating at full capacity.
Preventive recommendations for the client
Before leaving, our team took the time to share some practical advice:
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Have electrical connections checked once a year to prevent power surges.
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Avoid the accumulation of leaves or snow around the outdoor compressor.
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Schedule an AirGreen service every spring, ideally before the warm season.
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Install antifreeze protection under the drain to prevent ice from forming in winter.
Thanks to these simple actions, the customer will be able to extend the lifespan of their wall-mounted heat pump while maintaining its energy efficiency.
AirGreen Expertise: Fast and Reliable Service on the North Shore
This type of intervention perfectly illustrates the versatility of our AirGreen technicians , capable of working on all brands present in Quebec - whether North Cool, Gree, Fujitsu, Midea, Sharp or Bosch . We cover every sector of the North Shore , from Rosemère to Boisbriand , including Sainte-Thérèse and Blainville , but also all of Greater Montreal, Laval, Longueuil, the South Shore and the West Shore .
Our commitments:
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Accurate and transparent diagnosis .
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Immediate repair when possible .
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Certified replacement parts .
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After-service follow-up to ensure the durability of repairs.
Each call becomes an opportunity to demonstrate our rigor, our speed and our local know-how .
Comfort found in Rosemère
A few hours after the repair, the customer confirmed that the house was comfortable again and that the North Cool heat pump was perfectly meeting the demand, both for heating and cooling.
For us, each successful intervention is a reminder of our mission: to ensure the comfort of Quebec homes all year round , with efficient, sustainable HVAC solutions carried out according to the rules of the art.