In the quiet residential area of Sainte-Marthe-sur-le-Lac, our AirGreen technicians recently responded to a rather unusual HVAC service call, perfectly illustrating our ability to step in even under unexpected circumstances. This time, it was an old Manuflow wall-mounted heat pump that required our expertise. Specifically, a wall unit with yellowed plastic, bearing the signs of many years of use and sun exposure, that had completely stopped functioning. This visit is a perfect example of the reality of long-term HVAC maintenance.
Initial State: An Aging Manuflow Heat Pump
Upon arrival, the homeowner explained that the unit was no longer blowing hot or cold air, even when powered on. Additionally, strange noises were coming from the wall unit, including a faint, intermittent clicking. Visually, the plastic casing was yellowed, which is common for units over 15 years old that have been exposed to UV rays. This cosmetic wear reflected a very old system, but it was primarily the operational failure that prompted the service call.
After an initial visual and functional inspection, our team confirmed that the unit was no longer able to heat or cool properly, with a compressor that struggled to start — pointing to an electrical issue or a malfunction in the refrigeration circuit.
Technical Diagnosis: Electrical Failure and Advanced Deterioration
We ran a continuity test on the internal electrical components. It quickly became clear that the compressor start capacitor was defective. This component, essential for initiating the compressor motor, was completely shot. Once removed, we also found that the blower fan was heavily soiled, with the blades unbalanced due to dust and moisture buildup.
But the problem didn’t stop there. The refrigeration circuit showed signs of refrigerant leakage, likely caused by deteriorating seals. This explained the gradual drop in performance the client had noticed.
Proposed Repair: Between Quick Fix and Full Replacement
Faced with a very old unit experiencing multiple technical issues, we offered the client two options:
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Partial repair, including:
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Replacement of the start capacitor
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Full cleaning of the wall unit (fan, filters, coils)
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Refrigerant recharge (with temporary leak sealing)
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Complete replacement with a modern wall-mounted heat pump, more energy-efficient and eligible for incentives like Hydro-Québec’s LogisVert program.
After discussing and comparing short-term costs versus long-term savings, the client chose a temporary repair solution while considering a full replacement. At AirGreen, we understand that every budget decision matters, and we guide our clients with clear and honest advice.
Repairs Performed On Site
Our technicians then:
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Replaced the start capacitor with a compatible model (with voltage test)
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Cleaned the coils using a non-corrosive cleaner
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Disinfected and rebalanced the blower fan
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Recharged the refrigerant level, as a temporary fix, pending a full replacement
Following these interventions, the Manuflow heat pump was operating again, though we made it clear that this repair was only a short-term solution. The unit remains at high risk of future failure due to its general wear and tear.
Advice Provided to the Client
We took the time to discuss replacement alternatives with the client, including:
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The FUJITSU KZAH R-32 model, highly efficient and compact
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Gree Extrême units, known for their heating capacity down to -30°C
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The long-term advantages of upgrading to a modern system, Energy Star certified, with reduced energy consumption
We also explained that a unit this old:
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Often consumes up to 40% more electricity than a modern model
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Requires more frequent maintenance and increasingly hard-to-find parts
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Is not eligible for any subsidies, unlike newer systems
A detailed quote was provided for replacement, including available subsidies depending on the equipment chosen.
A Service Call That Reflects Our Field Expertise
This case in Sainte-Marthe-sur-le-Lac perfectly illustrates the realities of HVAC repairs on aging systems. It showcases our ability to tailor our solutions based on technical, financial, and personal factors. At AirGreen, every service call is handled with precision, transparency, and professionalism.
We never provide automatic solutions: each diagnosis is precise, and each recommendation is personalized. Most importantly, we help our clients through their energy transition, promoting sustainable, efficient, and cost-effective options.
Why Call AirGreen for Your Wall-Mounted Heat Pump Repairs in Sainte-Marthe-sur-le-Lac?
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Certified technicians with multi-brand expertise (Manuflow, Fujitsu, Gree, Bosch…)
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Customized repairs, based on equipment age and client goals
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Transparent pricing, with detailed reports and full documentation
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Quick availability, even for emergencies
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Support with LogisVert grants, for all replacement projects