A fast and efficient service call from AirGreen
At AirGreen , we regularly receive urgent calls during periods of extreme heat. On that day, our team responded to Saint-Constant , on Montreal's South Shore , to diagnose a TCL wall-mounted air conditioner that was no longer blowing cold air, despite the operating indicator being lit. The customer, visibly worried, feared a major breakdown—a scenario our technicians are familiar with.
Diagnosis: an internal communication problem
Upon arrival, we performed a complete inspection of the indoor unit.
The first signs left no doubt:
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The wall unit would turn on, but no fans would come on.
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The swinging shutter remained fixed in the closed position.
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No external compressor noise.
Using our Bosch voltage analyzer , we quickly confirmed that the power supply was stable. The problem was therefore a communication fault between the control board and the fan motor —a fairly common failure on some TCL models after a few years of continuous use.
Step 1: Opening and checking the electronic card
Our technicians removed the front panel of the unit, exposing the main board.
A visual examination revealed evidence of overheating in the motor relay area .
After measurement, the relay showed abnormal resistance.
We therefore advised the customer to replace the complete electronic board , rather than attempting a one-off repair, in order to ensure long-term reliability.
Step 2: Cleaning and preventive check
Before installing the new card, we took advantage of the intervention to carry out a complete cleaning of the filter, the evaporator and the condensate tray .
These operations, although often neglected, allow us to:
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Optimize air conditioner performance.
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Reduce the risk of future electronic failure.
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Extend the overall life of the system.
We also checked the connection of the indoor unit with the Carrier outdoor condenser , located in an adjacent technical closet.
Everything was in order.
Step 3: Replacement and Testing
Once the new card was installed and reprogrammed, we rebooted the system.
Immediate result:
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The swing shutter opened automatically.
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The indoor fan motor has resumed normal operation.
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The outdoor compressor has cut in with a 3 minute safety delay.
After 10 minutes of testing, the measured blowing temperature reached 12°C , confirming optimal performance.
Result: comfort restored and reliability assured
The customer immediately regained comfort in his living space, while benefiting from a detailed explanation of the causes of the breakdown and good maintenance practices.
We recommended an annual preventative cleaning as well as an electronic card check every three years , in order to avoid a recurrence.
Why choose AirGreen for your HVAC system repair in Saint-Constant?
At AirGreen , each intervention is treated with the same rigor:
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Technicians certified by the CMMTQ and the RBQ .
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Accurate diagnosis thanks to professional electronic measuring tools.
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Genuine parts compatible with major brands: TCL, Gree, Midea, Fujitsu, Sharp, and more.
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Fast service throughout the South Shore, including Saint-Constant, Brossard, Sainte-Julie and La Prairie.
Our approach combines technical expertise and local commitment , to provide a reliable, sustainable and transparent HVAC repair service.
AirGreen Tips to Extend the Life of Your TCL Air Conditioner
To avoid recurring breakdowns, our experts recommend:
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Clean the filters every 2 to 3 months.
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Have the drainage checked to prevent condensate overflows.
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Turn off the power supply during a long absence to avoid power surges.
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Have the outdoor unit inspected before each summer.
These simple actions help reduce the risk of electronic failure , which is particularly common on the control boards of wall units.
AirGreen: your HVAC partner on the South Shore
Our mission is not limited to repair.
At AirGreen , we support our clients in the maintenance, optimization and modernization of their HVAC systems, whether wall-mounted air conditioners, heat pumps or central systems .
With every call, we aim for performance, durability and peace of mind .