A Wintertime Service Call on the South Shore of Montreal
At AirGreen, we were recently called in for an HVAC service call in Saint-Lambert, on the South Shore of Montreal, involving a wall-mounted heat pump by Manuflow. The homeowner had noticed that the outdoor unit was no longer operating properly, even though snow had recently accumulated on top of the system. The unit seemed to be suffering from performance loss, especially in heating mode, right when outdoor temperatures had dropped to critical levels.
Our team stepped in quickly to diagnose and correct the situation, taking into account not just the unit’s operational functionality, but also its safe operation during winter conditions.
A Wall-Mounted Heat Pump Facing Harsh Weather Conditions
Wall-mounted heat pumps like this Manuflow unit installed on a north-east facing brick wall are often heavily exposed to snow buildup, ice, and cold winds. During our inspection, we found:
-
A compact layer of snow covering the fan.
-
Ice beginning to form at the base of the unit.
-
Partial obstruction of the air intake.
-
Abnormal vibrations when the compressor started.
These signs pointed us toward a ventilation restriction issue, as well as a risk of thermal overload on the fan motor.
In-Depth Technical Diagnosis by Our HVAC Team
Our technicians, specialized in wall-mounted heat pump repair, performed a thorough set of diagnostic checks:
-
Verification of all electrical connections and power supply voltage.
-
Testing of the compressor and outdoor fan motor.
-
Reading refrigerant pressures (R410A) to detect leaks or abnormal pressures.
-
Inspection of the drain line and automatic defrost cycle.
We determined that while the unit’s defrost cycle was functioning correctly, an ice buildup on the fan blades was hindering its efficiency. Additionally, one of the condensate lines was only partially insulated, allowing internal freezing of the water.
Solutions Implemented by AirGreen
Based on our diagnosis, our team carried out several immediate and preventive corrective actions:
-
Complete manual cleaning of the outdoor unit, including careful removal of snow and ice using non-abrasive tools.
-
Controlled defrost using warm air to protect the fan motor.
-
Replacement of the heating tape around the condensate recovery tray.
-
Added insulation around the exposed drainage pipe.
-
Final check of communication between the indoor and outdoor units via the electronic control module.
We also recommended that the client install a protective awning above the unit to help prevent future snow accumulation in winter, and to have the system inspected every fall to avoid this type of issue.
Result: Restored Performance and a Satisfied Client
Following these repairs, the Manuflow heat pump was back to full working order. The fan was running smoothly without any abnormal noise, refrigerant pressure levels had normalized, and the heating performance inside the home was immediately noticeable. The homeowner, keen to avoid future winter breakdowns, was reassured by our proactive approach and attention to detail.
Why AirGreen Is Your Trusted Expert in Saint-Lambert
Our team operates throughout the South Shore, including Longueuil, Brossard, and Saint-Lambert, with a focus on:
-
Fast and precise interventions, even in harsh weather conditions.
-
In-depth expertise on wall-mounted heat pumps, regardless of brand.
-
Preventive recommendations to extend HVAC system lifespan.
-
A strong understanding of residential HVAC needs in Greater Montreal.
Whether you're dealing with an iced-up outdoor unit, electrical malfunctions, or drainage problems, we have the right, durable solutions that are fast to deploy.
The Importance of Proper Winter Maintenance
This Saint-Lambert service call highlights just how critical preventive maintenance on HVAC systems is—especially during Quebec’s harsh winters. An annual inspection by professionals like us helps:
-
Detect minor issues before they become serious.
-
Ensure the system is ready for freezing temperatures.
-
Optimize energy consumption, avoiding spikes in electricity bills.
-
Maintain indoor comfort no matter the weather.
AirGreen: Your Go-To for Wall-Mounted Heat Pump Repairs in Saint-Lambert
Thanks to our extensive field experience, familiarity with brands like Manuflow, and availability across the South Shore, we’ve become the trusted partner for single-family homeowners, multiplex dwellers, and small building managers alike.
Contact Us for HVAC Service Calls
Noticing issues with your wall-mounted heat pump? Experiencing reduced heat or unusual noises? Trust AirGreen for a fast, professional, and long-lasting response, whether you're in Saint-Lambert, Longueuil, or elsewhere on the South Shore.