An urgent service call on a typical Montreal balcony
At AirGreen , we regularly receive calls from clients living in apartment buildings in downtown Montreal . This was the case this time, in the Côte-des-Neiges neighborhood, where a client contacted us about a Lennox wall-mounted heat pump installed on her small red brick balcony. The problem: the outdoor unit was making an abnormal noise , and the unit was no longer producing stable heating or cooling.
On-site diagnosis: an electrical fault accompanied by fouling
Our technician, André, arrived on site that very morning. The system was about five years old and had been installed by an independent contractor. Upon examining the heat pump, we immediately noticed a few classic signs:
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Accumulation of dust on the condenser, reducing the efficiency of heat exchange;
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Slightly loose wiring in the electrical box;
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And above all, a poorly positioned drainage system , with the condensate pipe incorrectly inclined, causing water to return inside the unit.
The noise was coming from the outside fan : an imbalance caused by residual ice accumulated from the previous season.
Repair steps: rigor and precision
Our interventions followed the strict methodology that AirGreen is renowned for:
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Power cut and safety check. Before any manipulation, the technician secured the circuit breaker and tested the continuity of the electrical circuit.
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Complete cleaning of the condenser. We used a low-pressure biodegradable cleaner to remove deposits without damaging the fins.
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Fan realignment. After removing the grille, the motor was readjusted and secured with new anti-vibration screws.
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Drainage correction. The pipe was repositioned and insulated with new sheathing to prevent water accumulation or ice formation.
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Reconnection and functional tests. Finally, we restored power, checked the R-410A refrigerant pressure, and then observed the compressor and fan behavior during a complete cycle.
Result: comfort restored and performance restored
Once the job was completed, the Lennox heat pump operated quietly and smoothly. The temperatures blown inside returned to their normal levels: 21°C in heating mode , with stable electricity consumption . The delighted customer particularly appreciated the quietness found on her balcony.
We also took the time to recommend some good maintenance practices:
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Clean the internal filters every two months;
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Schedule a complete maintenance before each heating season;
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Protect the outdoor unit with a breathable cover during the winter, without ever blocking ventilation.
Why trust AirGreen for your Lennox heat pump?
Lennox heat pumps are renowned for their reliability, but like any HVAC system, they require periodic maintenance. Our team is fully versed in the manufacturer's various series, including the MLA and SLZ ranges, which are very popular in Montreal and Laval.
By choosing AirGreen, you benefit from:
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Fast and local service , available everywhere in Montreal, Laval, the North Shore and the South Shore ;
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With certified expertise from Lennox, Fujitsu, Gree, Midea, and more ;
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Qualified technicians capable of diagnosing and correcting electrical, mechanical and refrigeration faults;
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A guarantee on all our repairs .
A service focused on sustainability and energy efficiency
Our approach aims not only to repair , but also to optimize the energy performance of each appliance. In the case of this Lennox, we reduced the compressor cycle time by 15%, thus extending its useful life and reducing overall electricity consumption.
This type of intervention perfectly illustrates our commitment: to offer sustainable and energy-efficient comfort to every home in Greater Montreal.