A breakdown at height, an AirGreen service to match
In Montreal's vibrant Rosemont–La Petite-Patrie neighborhood, our AirGreen team was called in to repair a GoldStar wall-mounted heat pump installed on the brick facade of a residential building. The client reported a complete lack of heating , even though the system had appeared to be operating in cooling mode a few weeks earlier. The outdoor unit, mounted high on wall brackets, required methodical and safe intervention.
Initial inspection: safety and precise diagnosis
Our technicians began by securing the intervention area with portable scaffolding adapted to the brick facade. From the first observations, we noticed that the fan of the outdoor unit was no longer starting in heating mode , although the compressor was trying to start at irregular intervals.
Checks carried out:
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Supply voltage : correct at 240 V;
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R-410A refrigerant pressure : within normal ranges at standstill;
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Fan Motor Continuity Test : Open (Breaked Circuit).
The diagnosis was clear: the outdoor fan motor was burned out . This type of failure often occurs after several freeze-thaw cycles, when the motor struggles to restart in extremely cold conditions.
Intervention: Engine replacement and performance test
After confirming the part's compatibility, we proceeded to completely replace the GoldStar fan motor , using a certified original replacement model. The key steps of the repair:
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Safe electrical disconnection of the outdoor unit;
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Disassembly of the ventilation housing and the protective grille ;
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Removal of the defective engine and cleaning of the turbine shaft ;
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Installation of the new engine with new seals to prevent water infiltration;
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Reconnection and full functional test .
Once the repair was complete, the fan resumed normal operation. We observed a steady airflow and a rapid temperature rise inside the indoor unit. The compressor and control board responded perfectly to the automatic defrost cycles.
Optimization and preventive maintenance
In addition, we advised the client to clean the filters and coils every six months , which is particularly important for wall-mounted units installed high up and exposed to the wind. This type of installation, although visually discreet, is subject to:
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More marked thermal differences , due to direct exposure;
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Faster fouling of the condenser fins by urban dust;
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Increased vibrations if the supports are not maintained.
So we tightened the fasteners, applied an anti-corrosion sealant to the bolts, and checked the condensate drain to prevent any accumulation of frozen water under the unit.
A reassured customer and a refurbished heat pump
Within minutes of the full reboot, the customer experienced an immediate return to thermal comfort . The indoor temperature quickly reached the programmed setpoint, and the GoldStar heat pump resumed its quiet and efficient operation.
This intervention illustrates the AirGreen philosophy: sustainable repairs, precise and transparent service , and particular attention to safety and performance, whatever the complexity of the installation.
AirGreen: the trusted HVAC expert in Montreal, Laval and the North/South Shore
At AirGreen, we understand that every HVAC system, whether GoldStar, Fujitsu, Midea, Gree, Sharp, or Carrier , has its own unique features. Our trained and certified technicians ensure that:
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Diagnoses are based on concrete measurements and not assumptions;
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Repairs use high quality original parts ;
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Performance is tested and validated before the team leaves.
Our coverage includes all of Greater Montreal , from Laval to Longueuil , including the North Shore and the South Shore . Each intervention is documented, explained to the client and accompanied by clear recommendations to maintain maximum efficiency of the HVAC system.
AirGreen , your trusted partner for all wall-mounted heat pump repairs in Montreal , combines technical expertise, rapid response and excellent service.