In a condo in Ville-Marie , a client contacted us about a Panasonic wall-mounted heat pump that was only partially functioning: the unit would start, but the airflow seemed weak , comfort was compromised, and a musty odor was noticeable after a few minutes of use. The photo clearly shows a Panasonic wall-mounted indoor unit (Inverter) , installed high near the ceiling, with visible traces of accumulated dirt around the airflow and fins—a typical sign that maintenance is now urgently needed.
We took charge of the diagnosis and the restoration, with our usual approach: clean, methodical, documented .
The type of equipment and the installation context
This is a Panasonic wall-mounted heat pump (mini-split) , inverter type (variable speed). The exact model is not visible in the image; therefore, we have treated it as a Panasonic residential wall-mounted heat pump (often comparable to the brand's "new generation" series).
Prominent installation details that can be observed:
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Indoor unit installed very high on the wall , under the ceiling (common configuration in condos).
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Status lights on the right (active operation).
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Visible accumulation of dust/dirt in the blowing area, which directly impacts the flow rate, noise, odor and sometimes even condensation.
Reported symptoms: what was wrong
In this type of Panasonic case, complaints often come in a "package", and this case was no exception:
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Less powerful air (you can feel it blowing, but not like before).
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Slower cooling/heating , especially during more demanding periods.
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Musty or damp smell when lit.
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Sometimes, secondary signs include: ventilation noise , a feeling of “frost” or longer cycles, and risks of water droplets if drainage becomes limited.
Our diagnosis: understand the cause before intervening
At AirGreen, we avoid "blind" interventions. For a Panasonic wall-mounted heat pump, we always verify:
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Condition of the filters and turbine (fan wheel)
When the turbine is clogged, the fan can still turn… but move much less air . The result: discomfort, odors, and reduced efficiency. -
Evaporator condition (internal coil)
A dusty coil acts like an insulating “coat”: heat exchange is poor, the machine has to work harder for longer, and condensation can be poorly managed. -
Condensate tray + drain
In condos, a partially blocked drain can create odors , intermittent overflows, or accelerated fouling. -
Functional checks
Blowing temperature, cycle stability, listening for abnormal noises, parameter verification and performance tests after cleaning.
In this case, the most telling element was the visible fouling at the level of the airflow : this was the priority, and very likely the root of the problem.
Repair and restoration: concrete steps (cleanly, without damage)
Here's how we proceeded on this Panasonic wall-mounted heat pump :
1) Protection of the premises (essential in a condo)
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Protection of the wall, floor and surfaces.
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Implementation of a controlled cleaning procedure to avoid splashing (very important in finished spaces).
2) Partial dismantling and internal inspection
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Opening the hood.
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Filter removal/inspection.
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Visual inspection of the turbine, coil, condensate tray and sensitive areas.
3) Deep cleaning (the “real” repair)
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Cleaning the coil (evaporator) with appropriate products.
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Cleaning the turbine (ventilation wheel): this is often THE point that restores airflow.
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Controlled disinfection of areas where odors develop (humidity + dust).
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Cleaning of the fins, louvers and air outlet.
4) Drainage and condensates
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Cleaning the tray.
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Check and clear the drain (if necessary), to limit odors and prevent leaks.
5) Performance testing and customer validation
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Restart, stability check.
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Qualitative measurement of flow rate and perceived comfort .
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Control of noise, odors, and consistency of cycles.
Result: restored comfort and renewed confidence
After intervention, the improvement is usually immediate, and that is exactly what happened here:
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Significantly stronger airflow (the room is conditioned faster).
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The musty smell disappears upon ignition.
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More stable, more pleasant operation, and often less noisy .
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Customer reassured: the Panasonic device is back on track, with simple recommendations to avoid a relapse.
What we recommend to prevent this from happening again (Panasonic wall-mounted unit)
In Greater Montreal, between dust, cooking, humidity and intensive periods (heat waves / extreme cold), a mural can get dirty faster than you think.
Our practical advice:
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Clean/vacuum the filters regularly (simple, but crucial).
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Avoid leaving the machine running for months without maintenance if you notice: odor , reduced flow , condensation , noise .
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Plan for periodic deep cleaning (depending on usage, presence of animals, environment, etc.).
Why AirGreen for Panasonic repairs in Montreal?
We service Panasonic and other brand wall-mounted heat pumps with a results-oriented approach:
Clear diagnosis , clean intervention , post-work testing , and simple explanations for the client. Whether in a condo or a house, our objective remains the same: to restore comfort and extend the appliance's lifespan.