When a wall-mounted heat pump starts to get noisier, doesn't heat as well in the morning, or only blows lukewarm air when cooling, the problem isn't always major… but you shouldn't wait either. In Sainte-Dorothée, we recently performed a complete service on a Comfee wall-mounted heat pump installed on an exterior wall bracket, on the side of a residential house with an asphalt driveway (easy access, but exposure to leaves, dust, and temperature fluctuations).
At AirGreen , our approach is simple: to restore the machine to its best condition , safely, cleanly, and with checks that prevent breakdowns in the middle of January or during a heat wave.
A typical setup in Laval: outdoor unit on a wall bracket
The photo shows an outdoor unit of a mini-split (compact format, side grille, high installation) fixed on a metal wall bracket with a vertical line cover (pipe) to protect the refrigerant lines and cable.
This type of installation is common in Sainte-Dorothée:
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We want to keep the machine away from the snow and ice patches on the ground.
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We avoid passageways.
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and we protect the pipes for a cleaner finish.
But in return, the machine often suffers:
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accumulation of pollen and dust (especially near trees),
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micro-vibrations on the support if the anchors loosen,
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variations in defrosting during winter (heat pump),
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and sometimes less optimal drainage depending on the slope and positioning.
Which type of Comfee device is affected?
Here, we are looking at a Comfee wall-mounted heat pump (mini-split) (brand supplied).
The exact model is not legible in the image, but the configuration corresponds to a residential Comfee Inverter (recent generation), typically used for heating/cooling one floor, a large living room or an open space.
Why HVAC service is crucial, even when “it’s working”
The most common pitfall: the heat pump is working… but less efficiently . The result:
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increased electricity consumption
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unstable comfort (cold/hot zones),
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humidity less well controlled
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and accelerated wear (fan, compressor, electronic boards).
An AirGreen service therefore aims at both performance and prevention .
Our AirGreen service for a Comfee wall-mounted heat pump in Sainte-Dorothée
1) Quick and logical diagnosis (before touching anything)
We always begin by observing:
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operation at startup,
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abnormal noises (vibration of the support, fan, creaking),
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cycles (stability, stop/restart),
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blowing temperature and machine response.
2) External inspection: support, clearances and safety
In this specific case, the unit is wall-mounted: excellent for snow protection, but it requires structural verification. We are checking:
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strength of the anchors (brick and joints),
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condition of the substrate (corrosion, deformation)
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presence of anti-vibration pads and level,
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clearances around the exchanger (airflow).
3) Technical cleaning (not just “a quick rinse”)
For a Comfee unit, as with any mini-split system, a dirty outdoor unit means reduced performance. The procedure is as follows:
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cleaning the coils (using a suitable method, without damaging the fins),
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removal of debris (leaves, fine dust),
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propeller and engine inspection,
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Visual inspection for signs of corrosion or oil (possible indication of leak).
4) Refrigeration checks and performance controls
Without resorting to "filling with gas randomly", we approve:
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consistency of operating pressures/temperatures (depending on conditions),
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inverter stability,
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heating behavior (including defrost logic if applicable),
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General condition of connections and accessible cabling.
5) Checking the refrigerant lines and the line cover
The line guard visible in the photo is a good point: it provides protection. But we'll check anyway:
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sealing and fixing,
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possible friction
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entry points (water infiltration / condensation),
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intact insulation of the pipes (reduces losses and risks of condensation).
Symptoms that warrant service (and that are often seen in Laval)
If you have a Comfee wall-mounted heat pump and you note:
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The heating is adequate but slow to heat up.
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lukewarm air conditioning even at low settings
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odors upon ignition,
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vibration noise on wall/support
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too frequent “on/off” cycles,
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Unusual ice in winter
… a service and diagnosis can prevent a more costly breakdown.
What we recommend after a service visit
In Sainte-Dorothée, with its trees and distinct seasons, our typical recommendation is:
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1 complete service per year (ideally before winter),
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More frequent cleaning/checking if you have a lot of dust/pollen.
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checking for clearances around the outdoor unit (snow, leaves, branches).
And regarding simple good practices:
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keep a clear space around the outdoor unit,
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Avoid directing gutter water towards the unit.
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do not “force” the setting (it does not heat up faster, it just puts strain on the system).
Why AirGreen for your Comfee service in Laval?
Because our service is geared towards “real results”:
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clear diagnosis (what is normal vs. what indicates a breakdown),
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Clean and respectful maintenance of the equipment
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Mechanical checks + performance, not just aesthetics
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practical advice adapted to the Quebec climate .
Conclusion: A well-maintained Comfee = more comfort, fewer surprises
A properly installed and maintained Comfee wall-mounted heat pump can provide excellent year-round comfort. The service performed in Sainte-Dorothée perfectly illustrates this: the unit was functional, but a few key points (cleaning, mounting bracket checks, and performance validations) help stabilize efficiency and reduce risks during critical periods.
If you are in Laval (Sainte-Dorothée, Chomedey, Fabreville, Vimont, Duvernay, etc.) and your Comfee mini-split deserves serious maintenance, we will take care of it .