In the vibrant district of Le Sud-Ouest, in Montréal, we were recently called in to diagnose and repair a Manuflow wall-mounted heat pump installed in a loft with exposed concrete ceilings—typical of modernized industrial-style buildings in the area. This type of setting presents unique challenges that our technicians know well. This service call was a perfect opportunity to once again demonstrate our expertise in HVAC repair in a residential urban context.
A clean installation, but a faulty unit
The Manuflow unit was strategically installed near the ceiling, on a central wall, in an open-concept living space. This kind of setup optimizes air circulation, but it also requires special attention during maintenance. The client contacted us after noticing several issues:
-
A significant drop in airflow
-
An unusual noise when turning on
-
Inconsistent indoor temperatures, despite manual adjustments
The initial diagnosis revealed a problem with the fan motor and a heavy buildup of dust on the evaporator, due to lack of regular maintenance. In addition, the indoor temperature sensor was giving incorrect readings, which caused the unit to turn on and off intermittently.
In-depth technical analysis and initial findings
Our technicians performed a series of tests:
-
Checked for error codes on the indoor unit
-
Inspected the blower motor: identified mechanical friction
-
Thoroughly cleaned the evaporator with a high-pressure biodegradable product
-
Tested sensors using our portable diagnostic system
-
Measured airflow temperature to confirm post-cleaning performance
The specific Manuflow model, while generally robust, sometimes suffers from internal components that aren’t well-protected against fine dust particles—an issue made worse by concrete ceilings that tend to trap dust in upward air currents.
Targeted replacement of faulty components
Once the diagnosis was confirmed, we carried out the following repairs:
-
Replaced the indoor temperature sensor
-
Lubricated and realigned the blower motor
-
Reset the electronic control system after replacing the component
-
Fully disinfected the internal casing, especially the drainage tray
We also performed a check of the unit’s electrical insulation, which is essential in a space with a conductive ceiling, and confirmed that the electrical setup was compliant with CSA standards.
Result: restored performance and a satisfied client
At the end of the intervention, the Manuflow system was running at full capacity again. Airflow was stable, the noise was gone, and the indoor temperature quickly normalized. Our client was particularly relieved to learn that the unit didn’t need to be replaced — a good cleaning and a few repairs were enough to extend its lifespan by several years.
What this service call teaches us
1. Maintenance is key to longevity
Even a high-performance wall-mounted heat pump can see its performance drop if not serviced at least once a year. In this case, a basic inspection could have prevented the dust buildup that caused the failure.
2. Placement matters a lot
Exposed concrete ceilings, although stylish, increase the need for maintenance due to dust accumulation. Rising warm air pulls dust particles toward the wall-mounted unit.
3. Local expertise makes all the difference
At AirGreen, we understand the architectural specificities of neighbourhoods like Le Sud-Ouest. This allows us to provide fast, targeted repairs tailored to the realities of lofts, condos, and renovated heritage homes.
Why choose AirGreen for your HVAC repairs in Montréal and on the South Shore
-
Fast service calls across Montréal, including Le Sud-Ouest
-
Certified technicians trained on Manuflow, Fujitsu, Gree, Lennox, and more
-
Courteous, transparent service, backed by professional diagnostics
-
Spare parts available quickly, thanks to our local inventory
Maintenance tips for owners of wall-mounted heat pumps
To avoid this kind of breakdown, we recommend:
-
Cleaning filters monthly, especially in urban environments
-
Scheduling professional maintenance annually
-
Listening for unusual noises or performance drops
-
Avoid blocking the wall unit with furniture or decorations
Trusted service in Le Sud-Ouest
This service call for a Manuflow wall-mounted heat pump in Le Sud-Ouest is a great example of our ability to combine technical expertise, personalized service, and an understanding of Montréal’s urban environment. At AirGreen, we’re committed to delivering lasting, precise solutions tailored to every situation, whether it’s a simple tune-up or a complex repair.
