When reliability meets expertise: a successful service call in Montreal
At AirGreen , we know that a wall-mounted heat pump installed on a flat roof in an urban setting is not just a comfort device, but a true pillar of daily well-being. Recently, our team was called for an emergency repair in the Rosemont–La Petite-Patrie neighborhood of Montreal. The client reported that their Fujitsu heat pump had stopped heating for a few days, leaving their loft space without a stable temperature despite the still cool weather at the beginning of spring.
Complete diagnosis on a typical Montreal flat roof
Upon arrival, we immediately noticed that the outdoor condenser , installed on a gravel-covered flat roof, appeared to be receiving power, but the compressor would not start. After a voltage and continuity test, our technician quickly confirmed that the problem was a faulty internal thermal relay , preventing the compressor from starting despite a valid control signal.
The roof also had a slight accumulation of gravel around the wooden condenser support, which could interfere with ventilation. We therefore cleaned the area and readjusted the wiring to prevent unwanted contact with the elements.
The repair steps carried out
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Complete cut-off of the power supply for safe working.
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Disassembly of the condenser side panel to access the electronic card and the thermal relay.
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Check the electrical circuit using a multimeter to confirm the relay failure.
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Replacement of the thermal relay with a compatible original Fujitsu part.
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Power up and fully test the compressor and fan.
The restart went smoothly: the heat pump resumed its normal heating cycle, with balanced pressure and constant airflow inside.
Optimization and prevention for the future
At AirGreen, we never just fix it; we optimize every system we touch. After restarting, we have:
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Checked the R-410A refrigerant charge , confirming that it was stable.
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Inspected electrical connections for oxidation.
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Repositioned the power cable using weatherproof protective conduits.
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Recommended to the customer biannual preventive maintenance , particularly important for units installed on flat roofs in Montreal where dust and temperature variations are more marked.
Result: comfort restored and performance optimized
In less than two hours, our team restored full heating to the home , ensuring stable and quiet comfort. The client immediately noticed the difference: the heat pump was blowing hot air at the optimal temperature, and the outside noise level had returned to normal.
This intervention perfectly illustrates our commitment: fast, precise and durable HVAC repairs , carried out by certified and passionate technicians.
Why trust AirGreen for your HVAC repairs in Montreal
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Fast and local service : our teams cover all of Greater Montreal, including Laval, Longueuil, the North Shore and the South Shore .
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Fujitsu, Gree, Midea, and Sharp certified technicians .
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Complete and transparent diagnosis , with clear explanations for each intervention.
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Guaranteed original parts and attentive after-sales service.
Whether your system is on a roof, facade or in a basement, we adapt our methods to each configuration to guarantee optimal results.
In conclusion
This Fujitsu wall-mounted heat pump repair in Rosemont–La Petite-Patrie demonstrates our expertise in Montreal's demanding urban environments. Thanks to our rigorous service, rapid diagnosis, and long-lasting repairs, AirGreen continues to stand out as a leader in residential and commercial HVAC repair in the metropolitan area.