In many condos in Ville-Marie , the wall-mounted heat pump has become the number one HVAC system: compact, quiet, efficient… until the day it starts blowing lukewarm air, struggling to heat the room, or displaying a temperature that no longer reflects the actual comfort level. This is exactly the type of call we regularly receive at AirGreen , and this service call on a Goodman wall-mounted heat pump is a good concrete example.
On-site, the Goodman indoor unit was installed high on the wall, a typical condo configuration: minimal clearance, front airflow with an adjustable louver, and a digital temperature display on the front. Visually, nothing was "broken," but the client clearly told us: "We can hear it working, but the room temperature doesn't stabilize like it used to."
Observed symptoms: when a Goodman "works", but no longer performs
In this case, the reported and confirmed signs of the diagnosis resembled the following:
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Uneven heating: the room temperature rose slowly, then fell back down.
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Airflow present, but sensation of lukewarm air (especially in heating mode).
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Comfort varies depending on the time of day (often linked to actual demand and system modulation).
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The indoor unit appears clean, but performance is down.
This is important: a wall-mounted heat pump can continue to blow air and "appear to be working" even when it's unbalanced (due to fouling, drainage, sensors, load, communication issues, etc.). And in a condo, these small imbalances are quickly noticeable.
Our AirGreen approach: structured diagnosis, no guesswork
At AirGreen, we never start by "adding gas" or blindly replacing parts. A Goodman wall-mounted heat pump (often an inverter type) requires a methodical diagnosis.
1) Verification of settings and actual behavior
We first validated:
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the mode (heating/air conditioning),
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the instruction,
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the ventilation speed,
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the orientation of the shutter,
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and the stability of the display versus the actual temperature in the room.
Why? Because a simple mix of settings (auto/heat, speed too low, shutter too horizontal, etc.) can give the impression of a breakdown, when the system is simply protecting its operating logic.
2) Inspection of filters, evaporator and air circulation areas
Even when the filters "look fine", a capacitor quickly accumulates:
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fine dust
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textile microfibers,
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kitchen particles
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and sometimes a light oily film.
As a result, the heat pump exchanges heat less efficiently, modulates poorly, and may start cycling or provide less stable heating/cooling. Therefore, we have:
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Removed and cleaned the filters properly.
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checked the condition of the evaporator (fins),
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inspected the turbine/blower (frequent source of reduced flow when it gets clogged).
3) Drainage control (condensate)
In heating systems, it's less of a concern, but drainage remains critical (and even more so in air conditioning systems). A partially blocked drain can cause:
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water accumulation,
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internal humidity,
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poor drainage,
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and sometimes erratic behavior (according to models).
We have validated the slope, the flow and the absence of obstruction.
4) Operational measurements and cycle validation
Next, let's look at the facts:
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reading the parameters (incoming/outgoing air temperatures),
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stability of the cycle,
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machine response to sustained demand
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and general verification that the unit delivers a consistent temperature difference.
When performance declines, this type of measurement helps to distinguish:
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a problem with a clogged heat exchanger,
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a sensor/probe issue,
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an air restriction,
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or a more “refrigeration-related” imbalance (load, restriction, etc.).
The repair: upgrading, targeted cleaning and optimization of diffusion
In this specific case, the “breakdown” was primarily a progressive loss of performance , typical in urban residential settings: the unit was working, but exchanging less well and diffusing less efficiently.
We therefore realized:
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Complete cleaning of the filters + perfect refitting (a poorly clipped filter can impair the flow rate).
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Targeted cleaning of accessible internal areas (without damaging the fins).
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Verification and securing of drainage (stable flow).
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Adjusting the air diffusion (flap orientation + ventilation parameters) to better cover the condo's living area, which is crucial in Ville-Marie where spaces are often open (living room/kitchen).
Result: comfort restored and Goodman heat pump “like new”
After the intervention, the following was observed:
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a faster and more stable temperature rise
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a better distributed airflow,
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fewer fluctuations in comfort
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and above all, a customer who rediscovered the feeling of a system “that follows demand” without forcing it.
That's exactly the goal: not just to repair , but to bring the machine back to its normal performance , especially for a wall-mounted heat pump which is supposed to be regular and efficient.
Why these interventions are common in condos (and how to avoid them)
In Ville-Marie, wall-mounted heat pumps operate in a very specific environment:
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drier air in winter (electric/central heating of the building),
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open kitchen (light fats),
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urban dust
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and sometimes intensive use (day and night).
Our simple tips:
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Clean the filters every 4–6 weeks (more often if pets/cooking).
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Do not block the air outlet (curtains, tall furniture).
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Performing an annual preventative check-up is often how you avoid costly breakdowns.
In summary (what we can take away from this Goodman repair)
This intervention on a Goodman wall-mounted heat pump in Ville-Marie clearly illustrates a reality: many problems aren't "spectacular" breakdowns, but rather performance drops that ultimately compromise comfort. With a proper diagnosis and thorough upgrade, the system can often be restored without unnecessary replacement.
At AirGreen , this is exactly how we work: rigorous diagnosis, targeted actions, and measurable results.