A service call for a broken air conditioner in the heart of the North Shore
It was in Sainte-Thérèse , on the North Shore of Montreal , that a customer recently contacted us about a complete breakdown of their Synergie wall-mounted air conditioner . The unit, installed in a main corridor, was no longer blowing cold air despite the green indicator light being on. In the middle of a summer heatwave, this breakdown compromised not only comfort, but also indoor air quality.
At AirGreen , we know that a sudden air conditioning shutdown can be a real headache for families. So, we dispatched one of our certified HVAC technicians to the customer's address the same day.
Precise diagnosis: blocked interior fan and weakened electronic card
Upon arrival, our technician conducted a methodical inspection of the system. The Synergie wall-mounted unit—a 12,000 BTU model running on R-410A refrigerant —had a steady power-on light , but the indoor fan refused to start.
After removing the front cover, a significant deposit of dust and fine grease was observed on the fan blades, partially blocking its rotation. At the same time, the control board showed local overheating around the motor relay. This combination of factors explained the blockage: the motor attempted to start, but the damaged board interrupted the sequence.
Intervention: deep cleaning and targeted replacement of components
Our team undertook a complete repair in three stages :
-
Thorough cleaning of the tangential fan using a non-corrosive biodegradable product to remove dust and residue.
-
Replacement of the faulty control relay on the electronic board, an operation requiring precision soldering.
-
Reassembly and restart test with measurement of supply voltages and rotation speeds.
Once these steps were completed, the air conditioner resumed normal operation. The pulsed air reached 8°C at the outlet of the exchanger , a performance fully in line with the specifications of the manufacturer Synergie.
Result: immediate comfort and optimized consumption
A few minutes after restarting, the ambient temperature in the corridor had dropped back to 22°C , and the entire house was back to a uniform level of comfort.
The customer noted a noticeable reduction in noise —a direct result of cleaning the fan and realigning the motor. The power consumption measured via the current clamp was stable, a sign of a motor that had become efficient again .
We took advantage of this visit to recommend to him:
-
to have your filters cleaned every 4 to 6 weeks;
-
to plan annual preventive maintenance before the hot season;
-
to avoid blocking air circulation around the indoor unit;
-
and to cut off the power supply in the event of abnormal flashing of the control light.
The AirGreen commitment on the North Shore and throughout Greater Montreal
At AirGreen , we provide repair and maintenance for Synergie, Fujitsu, Gree, Midea, Sharp and Goodman systems throughout Montreal, Laval, Longueuil, the North Shore and the South Shore . Each intervention is based on three pillars:
-
Fast and accurate diagnosis , based on professional measuring tools;
-
Original or equivalent certified parts ;
-
Transparent service , with no surprises for the customer.
Our goal is simple: to restore your comfort by extending the life of your HVAC system .
Conclusion
This Synergie wall-mounted air conditioner repair in Sainte-Thérèse perfectly illustrates our approach: a rigorous diagnosis, a targeted intervention, and immediate results. At AirGreen , every customer benefits from the same technical rigor and the same commitment to the performance and reliability of their device.