The Hidden Consequences of Extreme Cold on Your Wall Heating System in Laval
Every winter in Laval, extreme cold snaps put a serious strain on the wall-mounted heat pumps installed in Quebec homes. Even if your unit seems to be working fine, these cold periods can cause invisible damage to its internal components. These impacts often go unnoticed until performance starts to drop… or a sudden breakdown occurs without warning.
At AirGreen, we’ve seen firsthand the negative effects these freezing temperatures can have on HVAC systems, especially in cases where homeowners didn’t have their unit checked in time. Here’s why a preventive inspection after a cold snap isn’t just a good idea—it’s essential.
Frost and Ice: The Invisible Enemies of Your Wall-Mounted Heat Pump
When the temperature drops below -20°C, the outdoor unit of your wall-mounted heat pump can accumulate frost faster than it can defrost. This leads to compressor overload, reduced airflow, and poor heat exchange.
Real-life example:
In Fabreville, after a brutal cold spell, we were called in for a Fujitsu 12,000 BTU unit that appeared to be running… but wasn’t heating properly. The outdoor fan was turning sluggishly due to a thin layer of ice, invisible to the naked eye. A quick cleaning and defrost setting adjustment restored full performance.
Components Weakened Without Visible Signs
Even when the system keeps running, extreme cold can cause internal damage such as:
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Hairline cracks in copper piping
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Less responsive electronic sensors
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Accelerated wear on fan motors
These issues are almost impossible for homeowners to detect, but if left unresolved, they often lead to expensive repairs down the line.
AirGreen recommendation:
Have your wall-mounted heat pump inspected by a certified technician after each extreme cold snap. This helps prevent failures, allows fine-tuning of defrost settings, and ensures proper condensate drainage.
Preventive Maintenance Beats Costly Replacements
A post-cold snap inspection takes about an hour but can save you hundreds or even thousands of dollars in the long run. Many major repairs could have been avoided if the system had simply been checked in time.
Typical service call:
At a duplex in Chomedey, our team inspected an 18,000 BTU Sharp ZU1 heat pump installed two years prior. The result: a small leak at a fitting, caused by thermal shock. We fixed it on-site, preventing refrigerant loss and a complete system shutdown.
When Should You Have Your Wall-Mounted Heat Pump Inspected?
Watch for these warning signs:
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Warm or cold air coming from the indoor unit despite the thermostat being set to heat
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Unusual frost build-up on the outdoor unit
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Strange noises during operation
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Very frequent on/off cycles
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Water draining poorly or overflowing from the drainage pipe
Our recommendations for Laval and nearby regions:
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Schedule a routine inspection in February or March, after the coldest weeks
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Don’t wait for a breakdown—get it checked before the busy repair season
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Choose a local company like AirGreen, who understands the specific climate challenges in Laval, Montreal, Longueuil, North Shore and South Shore
What’s Included in an AirGreen Post-Cold Snap Inspection?
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Complete inspection of the outdoor unit (grille, coil, fan, frost, motors)
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Check of the indoor unit (air temperature output, filters, sensors, overall function)
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Refrigerant and pressure readings
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Energy performance test
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Custom recommendations based on your system’s condition
We tailor every service based on the unit’s age, brand, model, and maintenance history. Whether you own a Fujitsu, Gree, Midea, Sharp, or Bosch, our trained technicians deliver precise, targeted service.
Why Trust AirGreen for Your Wall-Mounted Heat Pump Inspection in Laval?
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Well-established local company, with hundreds of successful calls throughout Laval
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Experts in high-performance wall systems, even in extreme cold
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Experienced technical team, fast and transparent
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Clear pricing, fast appointments, courteous customer service
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Advice on maximizing your LogisVert rebates and extending your unit’s lifespan
Conclusion: An Inspection Today, a Reliable System Tomorrow
Cold snaps are a fact of life in Quebec. But unexpected breakdowns don’t have to be. By planning a post-cold snap inspection with AirGreen, you protect your system’s performance, secure your comfort, and avoid surprise repair bills.
We’re here to support you—winter after winter.