Restoring the comfort of a PTAC-heated apartment during a Montreal winter
At AirGreen , we regularly work in residential buildings in the Côte-des-Neiges–Notre-Dame-de-Grâce area, where many homes are equipped with PTAC systems —compact units built into windows that provide both heating and air conditioning . This type of unit, while efficient and discreet, requires rigorous maintenance to maintain its optimal performance.
The context of the service call
In the middle of January, a customer contacted us because their Gree PTAC was no longer producing heat. Despite a normal display and the fan operating, the blown air remained cold. A common occurrence at this time of year, especially when the internal heating elements are starting to show signs of fatigue.
Upon receiving the call, our team planned a rapid intervention to prevent the apartment's temperature from dropping further.
On-site diagnosis: an internal electrical problem
Upon arrival, we found a clean, well-maintained system , but an inactive heating module . The checks were carried out according to our standard protocol:
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PTAC power supply voltage test
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Heater Relay and Control Board Inspection
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Checking the thermal fuse and heating element
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Measuring coil resistance
Result: the heating element was open , a sign of an internal rupture due to wear. The device, although recent, had been used intensively for several winters.
Solution: Replacement of the heating module and return to service
We completely replaced the heating module with a certified Gree original part. Once installed, the system was tested over several complete cycles:
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Rapid temperature rise
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Stabilization of hot air flow
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Checking thermal safety devices
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Calibration of the wall thermostat
In less than an hour, the PTAC was working perfectly again , ensuring even heat distribution throughout the room.
AirGreen Expertise: More Than Just a Repair
This type of intervention perfectly illustrates our philosophy: an accurate diagnosis before any replacement . At AirGreen, we never change a part by chance. Each repair is preceded by a complete analysis of the cause to avoid any recurrence.
In this specific case, we also took care of:
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Clean internal coils and air filters.
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Check the condition of the joints around the wall formwork (often a source of heat loss).
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Check the power wiring to eliminate any risk of overheating.
These complementary actions not only guarantee the reliability of the system, but also better energy efficiency , essential in a context where the cost of electricity in Montreal encourages optimizing each kilowatt.
Prevention and recommended maintenance
A well-maintained PTAC can operate efficiently for more than ten years. However, dust accumulation, repeated heating and cooling cycles, and voltage fluctuations can accelerate the wear of certain components.
We recommend that all building owners and managers schedule an annual inspection that includes:
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Cleaning the evaporator and condenser coil
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Heating element test
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Checking the temperature sensors
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Inspection of electronic cards
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Preventive replacement of air filters
Regular maintenance not only helps prevent breakdowns in the middle of winter, but also reduces electricity consumption and improves indoor air quality.
AirGreen: a trusted partner for your PTAC systems in Montreal
For several years, AirGreen has been supporting building and condominium owners in Montreal, Laval, Longueuil, the North Shore and the South Shore in the repair, maintenance and replacement of their HVAC systems . Our team has in-depth expertise in PTAC, VTAC, wall-mounted, central and ducted models from the leading brands on the market: Gree, Amana, Sharp, Midea, Fujitsu, Bosch and more.
Each intervention is documented, certified and complies with the requirements of the Régie du bâtiment du Québec (RBQ) . We always intervene with transparency, professionalism and respect for deadlines.
Result: restored comfort and lasting performance
After our visit, the Côte-des-Neiges customer was able to regain stable and quiet thermal comfort . The new heating module, tested and calibrated, now offers optimal performance, and the device has regained its dual heating/air conditioning function.
The intervention made it possible to extend the life of the system while reducing its energy consumption.
Your comfort, our priority
At AirGreen, every service call is an opportunity to demonstrate our commitment to quality, technical precision, and customer satisfaction . Whether your system is a Gree PTAC , a wall-mounted heat pump , or a central unit , our team of certified technicians is ready to respond quickly throughout Greater Montreal.