When winter firmly settles over the South Shore, every heating system becomes essential. In Saint-Bruno, a client contacted us urgently due to a malfunctioning Manuflow wall-mounted heat pump, while snow blanketed her yard and outdoor temperatures dropped well below freezing. At AirGreen, we understand just how critical it is to maintain consistent thermal comfort, especially when the outdoor climate is this harsh.
Service Call Context: A Faulty Manuflow Wall-Mounted Heat Pump During a Critical Period
The client had noticed over several days that her wall-mounted heat pump was no longer producing enough heat. The airflow was weak, indoor temperatures remained cold despite being set high, and no error codes were visibly displayed. Clearly installed in a high-traffic area above a patio door leading to the snowy backyard, the unit appeared to be properly positioned, but its heating output was abnormally low.
Upon arrival, we took the time to inspect both the indoor wall-mounted unit and the outdoor compressor, hidden under a layer of snow.
Technical Diagnosis: Moisture Buildup, Dirt Accumulation, and Partial Fan Blockage
Our initial inspection revealed several issues:
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Dirty indoor filters, significantly reducing the flow of warm air.
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Excess condensation on the ceiling above the unit, leaving visible marks and indicating a possible drainage problem or poor insulation.
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The blower fan was beginning to clog, causing a faint humming noise.
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A high humidity level in the room, worsened by partially blocked ventilation.
This kind of malfunction is typical of wall-mounted heat pumps that are not maintained properly during winter, especially when they operate at full capacity without regular checks.
Repair Steps Carried Out by Our AirGreen Team
We performed a complete cleaning of the indoor unit, which included:
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Washing the filters with warm water and drying them completely.
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Vacuuming the evaporator fins using a soft nozzle to avoid any damage.
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Disassembling and cleaning the blower fan, whose fins were partially clogged with fine dust and pet hair.
At the same time, our technician inspected the outdoor compressor. Despite the snow, he confirmed:
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The compressor was functioning properly (no error codes, no overheating).
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The defrost water drain was slightly blocked by ice – a hot water rinse cleared it easily.
Final Result: Performance Restored, Indoor Comfort Regained
Once everything was cleaned and reassembled, we performed a full system restart of the Manuflow unit, in heating mode. The flow of warm air was significantly more powerful, the ambient temperature rose by 4°C in less than 15 minutes, and the client immediately noticed the difference.
She also appreciated that we:
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Took the time to explain how to clean the filters every two months.
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Suggested a better curtain placement to avoid blocking the airflow.
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Recommended possibly installing a small snow cover over the outdoor compressor to protect the unit during winter storms.
Maintenance Tips for Wall-Mounted Heat Pump Owners in Saint-Bruno
Here are some best practices to avoid winter breakdowns:
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Check filters every 4 to 6 weeks, especially during winter.
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Keep a clear space around the indoor unit to facilitate airflow.
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Protect the outdoor compressor from snow and ice buildup.
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Call on a professional team like AirGreen for an annual preventive maintenance.
Why Choose AirGreen for Your HVAC Service Calls?
At AirGreen, we specialize in wall-mounted heat pump repairs in Saint-Bruno, Longueuil, Montréal, Laval, and across the South Shore and North Shore. Our approach is based on:
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Thorough technical diagnostics.
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Efficient, targeted, and lasting repairs.
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Clear communication with the customer at every step.
We don’t just repair — we optimize your thermal comfort and help you extend the life of your equipment.
Conclusion: A Simple Yet Crucial Repair
This repair of a Manuflow wall-mounted heat pump in Saint-Bruno clearly illustrates our ability to respond quickly, even in the heart of winter, to restore our clients’ comfort. Thanks to a precise diagnosis, targeted technical actions, and personalized advice, we enabled this client to face the rest of the winter with peace of mind.
