When the comfort of a condo depends on an accurate diagnosis
Our AirGreen teams were recently called in to repair a Trane PTAC system in a condo located in Ville Mont-Royal , in the heart of Montreal. This type of unit, often used in apartment buildings or high-end residences, provides both heating and cooling for a room thanks to a compact unit built into the wall.
The customer contacted us after noticing a loss of heating power and intermittent warm air production , a common problem with Trane ProSpace models, especially after several years of continuous use.
The diagnosis: a thermal sensor problem and dust accumulation
Upon arrival, we performed a complete inspection of the PTAC module . Initial measurements revealed that the fan was working properly, but the compressor was not starting on every cycle .
Our technicians have undertaken a series of checks:
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Control of wall thermostat and supply voltage;
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Compressor inrush current measurement (initial amperage);
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Inspection of the interior temperature sensor (thermistor);
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Checking the condition of the condenser and evaporator .
The temperature sensor was reading more than 5°C incorrectly , preventing the compressor from starting properly. In addition, the intake grille was clogged with a thin layer of dust , reducing airflow and forcing the system to compensate with longer cycles.
AirGreen intervention: precision and efficiency
To restore the full performance of the Trane ProSpace PTAC , our team proceeded in several steps:
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Safe system disconnection and front cover removal;
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Replacement of the defective thermal sensor with an original Trane sensor;
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Complete cleaning of the evaporator and condenser using a certified biodegradable HVAC cleaner;
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Suction and dust removal of the ventilation turbine to eliminate micro-obstructions;
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Checking the wiring and power relays on the control board;
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Complete system reboot and performance test over multiple cycles.
Once the repair was completed, the Trane PTAC returned to full power. The hot air flow increased significantly, and the outlet temperature was once again reaching 45°C , a sign of a fully operational compressor.
Result: stable comfort and restored energy efficiency
The repaired Trane unit immediately demonstrated stable and quiet operation , with regular cycles and normalized energy consumption. The customer, satisfied with the result, particularly appreciated the professionalism and speed of execution of our team, who were able to intervene without causing any disruption to the home.
This type of intervention is common in buildings in Ville Mont-Royal, Outremont, and Côte-des-Neiges, where Trane and Friedrich PTACs are widely used for their compact size and energy efficiency. However, like any HVAC system, they require regular maintenance to maintain their original performance.
AirGreen Tips to Extend the Life of a PTAC
PTAC (Packaged Terminal Air Conditioner) units , whether Trane, Friedrich or Gree , have an average lifespan of 10 to 15 years, provided they are well maintained. Here are some recommendations from our experts:
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Clean air filters monthly during heating or cooling season;
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Avoid blocking air inlet or outlet grilles with curtains or furniture;
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Have the system inspected annually to detect performance losses before they cause breakdowns;
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Check that the temperature sensor and wall thermostat are working properly ;
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Clean the coils using suitable products to prevent corrosion.
Regular maintenance prevents electrical overloads, extends compressor life and reduces energy consumption by up to 20% .
AirGreen: Your HVAC Partner for PTAC and VTAC Systems in Montreal
At AirGreen, we specialize in the repair, maintenance and installation of residential and commercial HVAC systems , including Trane, Midea, Friedrich and Zephyr PTAC units .
Our technicians respond quickly in Montreal, Laval, Longueuil, on the North Shore and the South Shore , for precise diagnostics and lasting repairs. We use exclusively original parts and ensure a complete calibration of the system before each restart.
Whether you own a condo, a hotel, or a rental property, our team puts its expertise in wall-mounted air conditioning and PTAC to work for your comfort, summer and winter.
Conclusion: fast, reliable and long-lasting service
This Trane PTAC repair in Ville Mont-Royal perfectly illustrates the importance of expert and methodical intervention to restore the performance of an integrated system. Thanks to a rigorous analysis , a precise replacement of the thermal sensor and a complete cleaning of the device , AirGreen allowed the client to regain optimal comfort, while extending the life of their system.