In Rosemont–La Petite-Patrie, heat pumps are often installed on brick facades, halfway up, to free up ground space and limit the risk of snow accumulation. In the photo, the Comfee outdoor unit is mounted on wall brackets , with a covered refrigerant line descending vertically and an electrical disconnect box nearby: a typical situation where preventative maintenance and diagnostics must be carried out methodically, especially after a season of significant temperature fluctuations.
At AirGreen , our approach to residential HVAC service is simple: get the machine back to its best performance, reduce noise, prevent breakdowns, and protect the system's lifespan — without "overselling," just by fixing what needs fixing.
What this type of installation tells us (and why it's important in operation)
A wall-mounted heat pump (mini-split) like this one depends on three key elements to perform:
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Impeccable air exchange through the external coil and the fan.
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Consistent pressures and temperatures (coolant, superheating/subcooling as appropriate).
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Mechanical stability (vibrations, fixings, silent blocks, supports) to avoid noise, premature wear and micro-leaks.
Here, the unit is mounted high , exposed to wind and urban dust (pollen, fine particles, debris). Over time, the coil can become overloaded, the fan can work harder, and the heat pump can lose efficiency — resulting in higher bills, less consistent comfort, and sometimes more frequent defrost cycles in winter.
AirGreen service on a Comfee wall-mounted heat pump: our on-site method
1) Complete diagnosis (before “touching everything”)
We start by listening to the machine and understanding its symptoms: reduced cooling, less powerful heating, unusual noise, odors, short cycles, or high consumption.
Next, we check:
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Power supply and safety (disconnection, connections, signs of overheating).
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The visual condition of the external coil (dirt, leaves, obstruction, crushed fins).
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The fan (play, noise, vibrations, start-up).
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The fixings : wall brackets, screws, stability.
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The refrigeration line : insulation, casing, friction points, vibration risks.
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Operating parameters (blowing temperatures, defrosting logic, behavior under load).
The objective: to determine whether we are dealing with simple maintenance, a necessary adjustment, or a more specific problem (sensor, drainage, air restriction, etc.).
2) External maintenance: cleaning the coil and checking the fan
On a Comfee , as with any wall-mounted unit, a clogged coil can quickly reduce efficiency. We perform the following services:
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Controlled cleaning of the external battery (without damaging it).
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Inspection of the fins and slight straightening if required.
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Fan check: condition, mounting, noise, vibration.
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Water drainage control (condensation/defrosting) according to the configuration.
Expected result: better air circulation, less noise, and improved efficiency.
3) Interior maintenance: hygiene, airflow, comfort
Even though the photo shows the outdoor unit, a proper service also includes the indoor unit:
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Cleaning of filters and inspection for fouling.
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Checking airflow and diffusion (uniform comfort).
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Odor control (humidity, biofilm, dust).
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Drain check and prevention of overflows (very common during air conditioning season).
A clean wall-mounted heat pump is not only more efficient: it also provides more pleasant air every day.
4) Performance checks: actual output, not just “it blows”
After the interview, we confirm:
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Blowing temperature and stability.
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Machine's response to instructions.
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Noise and vibrations after reinstallation.
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Overall behavior in heating/cooling mode (depending on the season).
When relevant, particular attention is paid to indicators that may signal a progressive loss of performance (for example: fan straining, abnormal cycles, heavily soiled heat exchanger, vibrating support).
Specific points to consider regarding this configuration (brick wall, single-story structure)
Vibrations and noise: often a "small detail" that becomes a big problem
A wall-mounted unit must remain stable. During operation, the following checks are performed:
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Tightening and integrity of the supports.
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Presence (or wear) of anti-vibration elements.
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Any possible contact between casing/piping and wall, which can transmit noise inside.
Exposure to the elements: prevention is better than repair
In Quebec's climate, the service also aims to prepare the machine:
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Defrosting: ensure that nothing obstructs operation.
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Accumulations: check for obstructions or debris.
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Quick inspection of sensitive areas (signs, protections, general condition).
Why have a Comfee serviced regularly
Even a reliable heat pump can lose performance if maintenance is neglected. Regular servicing ensures:
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To reduce electricity consumption .
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To improve comfort (more stable temperature).
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To limit breakdowns (fan, drainage, fouling).
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To extend the lifespan of the system.
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To maintain quieter operation.
How often should I schedule residential HVAC service?
In practice, for a wall-mounted heat pump:
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One maintenance per year is an excellent standard (often before summer or before winter).
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Two maintenance visits per year may be justified if: allergies, pets, intensive use, dustier housing, or sensitivity to noise/odors.
In Rosemont–La Petite-Patrie, with urban dust and distinct seasons, regular maintenance makes a real difference.
AirGreen in Rosemont–La Petite-Patrie: a clean, clear and efficient service
We operate with a simple logic: diagnose correctly, clean what needs to be cleaned, secure what vibrates, check performance, and leave you with a Comfee heat pump that works as it should.
If your machine is noisier than before, less efficient, or if you simply want to refurbish it before the season, our service is designed for that.