A service call in the middle of the winter cold
At AirGreen , we frequently receive calls in the winter about outdoor units that struggle to restart after several days of freezing temperatures. This was precisely the case in Boisbriand , on the North Shore of Montreal , where a customer contacted us about their GoldStar wall-mounted air conditioner that was no longer responding.
The outdoor unit, installed on a red brick wall typical of single-family homes in the area, displayed a clear symptom: the fan wouldn't turn on , even when the system was called upon for heating. A slight frost had formed on the front grille—a telltale sign of an electrical problem or a stuck motor.
Accurate and safe diagnosis
Upon arrival, our technician began by checking the power supply voltage at the circuit breaker and the service box attached next to the unit. The voltage was present, confirming that the fault was originating from the unit itself.
After removing the protective panel, we found:
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A slightly blackened electronic card , a sign of a minor short circuit;
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Oxidized wires at the fan relay;
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A fan blocked by a buildup of dirt and ice.
A continuity test confirmed that the fan motor was still functional , ruling out the need for a complete replacement.
Repair and recommissioning
We have proceeded to:
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Complete cleaning of the engine and fan compartment;
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Replacing the faulty relay on the main board;
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Application of anti-corrosion treatment to the connectors;
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Complete reset of the GoldStar system after checking the starting voltage and current.
After these interventions, the fan started rotating normally again, and the unit returned to stable operation, blowing constant warm air inside.
Result: restored comfort and extended lifespan
Thanks to a quick and methodical intervention, the customer was able to avoid a costly replacement of their HVAC system. The GoldStar unit, although old, continues to offer satisfactory performance when properly maintained.
We advised the client:
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Perform preventive maintenance in the spring , before the air conditioning season;
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To keep the unit clear of snow and ice during the winter;
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And have the electronic card checked every two years to prevent further overheating.
AirGreen expertise: reliability and transparency
Every service call is an opportunity for us to demonstrate our commitment to diagnostic quality , cost transparency , and the longevity of HVAC installations . In Boisbriand, as elsewhere on the North Shore, we always prioritize repair before replacement , when safety and efficiency allow.
Our certified technicians are trained to work on all major brands in Quebec: GoldStar, Gree, Fujitsu, Midea, Sharp, Mitsubishi, and many others . Whatever the brand, our approach remains the same: analyze, repair, optimize.
Some lessons learned from this case
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Symptom: Fan inactive and no heating.
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Cause: Damaged electronic card relay + obstructed motor.
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Solution: cleaning, relay replacement, continuity test, recommissioning.
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Result: immediate restart, stable operation, satisfied customer.
A local partner for your HVAC emergencies
Whether you're in Boisbriand, Laval, Montreal, or Longueuil , the AirGreen team is available for any type of wall-mounted air conditioner or heat pump repair . We offer fast, professional service that's fully adapted to Quebec's climate conditions.
Our interventions guarantee:
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A clear diagnosis before any repair;
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Original replacement parts ;
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And personalized follow-up after each visit.
Your comfort deserves trusted expertise—and that's exactly what we deliver, every call.