In the world of residential HVAC service, some calls present unexpected challenges. That was the case for this service call in Mercier, where our AirGreen team was dispatched to inspect a Kreeg wall-mounted heat pump with an exterior installation that was clearly incomplete and potentially hazardous. This kind of situation highlights the importance of precise workmanship, both in terms of safety and energy efficiency.
Initial inspection: an installation left half-done
As soon as we arrived, several visual indicators caught our attention. The outdoor unit by Kreeg was properly mounted on the brick wall, but the electrical and refrigerant line connections were clearly unfinished. The wires were dangling, uninsulated, and unprotected against the elements. This posed a high risk of short circuits, energy loss, and premature equipment deterioration.
Moreover, there was no protective ducting installed along the path of the refrigerant lines down the wall. The conduits were exposed to freezing temperatures, snow, and UV rays, which could quickly lead to insulation breakdown and potential refrigerant leaks.
Technical diagnosis: risks and consequences of a poorly finished job
Our certified technician immediately identified the major technical problems with the installation:
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Exposed wiring not properly connected to the electrical panel.
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Refrigerant lines poorly secured, at risk of vibration or movement.
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No finish ducting, leaving the lines vulnerable to weather.
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System not commissioned, meaning it was never tested after the initial setup.
We also noticed that the condensate drainage had not been properly routed, posing a risk of water freezing on the nearby walkway, which could have been a safety hazard for the occupants.
Steps of our intervention: restoring order and ensuring safety
At AirGreen, every repair or HVAC service call is handled with rigorous procedures, designed to ensure longevity, safety, and performance. In Mercier, our intervention unfolded as follows:
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Full inspection of electrical connections, followed by secure wiring to the dedicated exterior breaker.
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Complete re-routing of the refrigerant lines, with installation of professional-grade ducting from the wall to the base.
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Organizing and securing the cables to avoid tension or future abrasion.
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Installation and sealing of the condensate drain for proper flow away from the structure.
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Pressure testing and leak detection to verify the integrity of the refrigerant circuit.
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Full system startup of the Kreeg wall-mounted heat pump and performance verification in heating mode (outdoor temps around 0°C with snow present).
A revitalized heat pump and a reassured customer
By the end of the visit, the Kreeg heat pump was running flawlessly, with no unusual noise or pressure loss. We conducted a start-up energy performance check to measure the unit’s efficiency. Results confirmed excellent thermal output, proving that the machine itself wasn’t to blame — it was the sloppy installation that had put the system at risk.
Our customer shared that the originally hired company had abandoned the job after mounting the exterior unit, leaving them without stable heating in the middle of March. Thanks to our prompt response and technical approach, they regained optimal indoor comfort.
What this service call teaches us
A wall-mounted heat pump installation is far more than simply attaching a unit to a wall and connecting a few wires. It’s a field-based engineering job requiring:
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Careful planning of conduit routing.
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Mastery of electrical safety standards.
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Technical expertise with refrigerant systems.
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An aesthetic mindset, since a clean installation preserves property value.
As experts in HVAC service in Mercier, Montreal, Laval, Longueuil, North Shore and South Shore, we’re often called to fix, improve, or completely redo poor-quality installations. This repair showcases the importance of hiring a qualified and certified company like AirGreen from the start.
Why choose AirGreen for your HVAC repairs?
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Certified technicians with experience across all major brands, including Kreeg, Gree, Fujitsu, Lennox, Bosch, and more.
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Fast service calls across Greater Montreal.
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Total transparency throughout the repair process, with clear explanations to the client.
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Warranty included for all repairs.
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Eco-conscious approach by extending the lifespan of existing equipment.
Our main service areas
We cover the following sectors for all heat pump maintenance and repair services:
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Mercier, Châteauguay, Longueuil, Saint-Constant
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Laval, Montreal, Anjou, TMR
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Brossard, Boucherville, Sainte-Julie
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Blainville, Boisbriand, Terrebonne, Mascouche
Contact us for fast and reliable HVAC repairs
Dealing with an unfinished installation, sudden breakdown, strange noise, or lack of heat? At AirGreen, we have the tools, expertise, and commitment to get your HVAC system back on track — no compromises.
Call us today for a free evaluation or an emergency heat pump repair in Mercier or anywhere else in Greater Montreal.