As part of our regular HVAC repair services across the South Shore, we were recently called out to Candiac for an urgent issue involving an Okyotech wall-mounted heat pump. Upon arrival, a quick visual inspection by our team revealed a serious situation: the outdoor unit of the heat pump was completely frozen on the left side, compromising not only the system’s efficiency but also its lifespan.
A common issue, but one that should never be underestimated
When the outdoor unit of a wall-mounted heat pump becomes covered in ice, it can result in:
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Excessive energy consumption
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Ineffective heating cycles
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Unusual noises or frequent shutdowns
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Premature wear and tear of components
This kind of malfunction is frequent during Québec winters, especially in residential areas like Candiac, where changes in humidity and temperature make systems vulnerable to ice buildup.
On-site diagnosis: quick detection of the cause
Our certified AirGreen technicians immediately initiated a full technical diagnostic, starting with:
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Verifying the automatic defrost mode
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Inspecting the temperature sensors
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Checking refrigerant pressures
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Evaluating the fan and motor
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Inspecting the clearance around the unit
In this particular case, the defrost system wasn’t activating properly, which led to the ice buildup. A faulty outdoor temperature sensor was identified as the root cause of the issue.
Repair steps for the Okyotech wall-mounted heat pump
At AirGreen, every repair is handled with precision. Here are the key steps in our HVAC repair in Candiac:
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Safely powering down the outdoor unit
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Manual progressive defrosting of the unit, without damaging the fins
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Replacing the faulty outdoor temperature sensor
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Reprogramming the automatic defrost cycle on the control board
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Full cleaning of the coils and drain pan
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Restart and full check-up of the heating and defrost cycles
Why does ice build up on outdoor units?
Ice buildup on outdoor units of wall-mounted heat pumps can be caused by several factors:
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Improper system programming
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Lack of seasonal maintenance
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Blocked airflow due to debris, leaves, or snow
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Faulty temperature sensors
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Abnormal refrigerant pressure
For this installation in Candiac, the combination of a defective sensor and ineffective defrost cycles was the determining factor.
Maintenance tips to avoid this type of issue
To avoid facing a similar situation, our experts recommend that residents of the South Shore and Candiac follow these best practices:
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Have your wall-mounted heat pump inspected before every winter
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Ensure the outdoor unit is clear of obstructions (snow, branches, etc.)
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Opt for an annual AirGreen maintenance contract
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Respond quickly to unusual signs (noises, smells, performance drop)
Result: a restored heat pump and a satisfied customer
Thanks to our quick intervention, the Okyotech wall-mounted heat pump was fully restored. The automatic defrost cycle is once again operating normally, energy consumption has returned to optimal levels, and indoor comfort has been fully re-established.
The customer thanked us for our punctuality, accurate diagnosis, and clear explanations throughout the process.
Why trust AirGreen for your HVAC repairs in Candiac and the South Shore?
At AirGreen, we stand out thanks to:
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Our specialization in wall-mounted heat pump repairs for multiple brands, including Okyotech, Fujitsu, Gree, Lennox, Bosch, Trane, and many more
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Our in-depth understanding of the Greater Montréal climate challenges
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Our personalized approach, combining technical efficiency with customer education
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Our fast response times, even during peak winter season
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Our durable solutions, with high-quality replacement parts and reliable warranties
A team committed to the performance of your HVAC system
Our technicians regularly undergo training on defrost technologies, modern refrigerants (R-32, R-410A, R-454B), and new electronic control interfaces, ensuring top-level wall-mounted heat pump repair service, regardless of brand or model.
Service in Candiac: a perfect example of local AirGreen expertise
This intervention in Candiac perfectly illustrates the importance of:
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Acting quickly when unusual signs appear
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Calling a qualified team for wall-mounted heat pump repair on the South Shore
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Investing in annual preventive maintenance to protect your system’s integrity
We carry out our mission with the highest standards: delivering reliable, professional, customer-focused local HVAC service across Montréal, Laval, Longueuil, North Shore, and South Shore.