A faithful device refurbished thanks to AirGreen expertise
At AirGreen , we are often called upon to work on Fujitsu systems that have endured decades of service. These devices, known for their exemplary reliability, sometimes require special attention to restore their original performance. This was the case during this service call in Sainte-Julie , on the South Shore, where a Fujitsu wall-mounted air conditioner had not produced cold air for several days.
Symptoms observed and initial assessment
Upon arrival, the customer explained that the unit started normally, but no fresh air came out, even when the outdoor compressor started. In addition, irregular flashing of the green light on the control panel indicated an internal error code .
Our technicians immediately suspected a temperature sensor problem or a faulty electronic board , common causes on older Fujitsu units.
Accurate diagnosis and complete inspection
As with every AirGreen intervention, we carried out a structured diagnosis:
-
Checking the air filter , saturated with dust and pollen.
-
Measuring the power supply voltage of the indoor unit.
-
Inspection of the thermistor sensor , which was found to be out of tolerance, causing the compressor to automatically shut down.
-
Communication test between the main board and the outdoor unit, confirming an anomaly in temperature reading.
We therefore established a double diagnosis:
-
Faulty temperature sensor , must be replaced.
-
Slightly oxidized electronic board , requiring cleaning and additional protection.
Technical intervention: rigor and precision
Our AirGreen certified technician took the following steps:
-
Replacement of the thermistor sensor with an original Fujitsu part.
-
Complete cleaning of the electronic card , followed by application of insulating varnish to prevent corrosion.
-
Deep cleaning of the evaporator and tangential fan to restore optimal airflow.
-
Complete test of the refrigeration circuit , with reading of the pressures of the R-22 refrigerant still present in the system.
-
Calibration of the control module , to ensure data consistency between the two units.
Once these steps were completed, the unit restarted without error and immediately blew a steady and powerful stream of cold air.
Results and customer satisfaction
The customer could feel the difference from the first minutes:
-
Rapid room cooling .
-
Operational silence restored.
-
No errors on the order screen.
We also took the time to explain to the owner that his device, although old, could still offer several years of performance provided that it was rigorously maintained annually .
AirGreen Tips to Extend the Life of Fujitsu Air Conditioners
For any owner of a Fujitsu wall-mounted air conditioner that is more than ten years old, we recommend:
-
Monthly cleaning of filters during the warm season.
-
Complete annual inspection by an AirGreen technician.
-
Check the refrigerant charge every two years to prevent gradual leaks.
-
Preventive replacement of thermistor sensors after 10 to 12 years of use.
-
Disinfection of the evaporator coil , often neglected, to prevent the proliferation of bacteria and mold.
Why trust AirGreen
Our team operates throughout the Montreal, Laval, Longueuil, North Shore and South Shore regions, with the same level of standards and professionalism.
We combine:
-
Certified and trained technicians on all brands: Fujitsu, Gree, Mitsubishi, Sharp, Midea, Hitachi, and more.
-
Original parts and latest generation diagnostic tools.
-
An ethical and transparent approach, favoring repair before the sale of a new device.
In conclusion
This Fujitsu wall-mounted air conditioner repair in Sainte-Julie perfectly illustrates the AirGreen philosophy: maximizing the lifespan of existing HVAC equipment while ensuring optimal comfort for our customers. Thanks to an accurate diagnosis and meticulous intervention, we restored the full performance of a unit that many would have replaced unnecessarily.
For any repair, maintenance or installation of HVAC systems , AirGreen remains your trusted partner, recognized for its local expertise, transparency and commitment to the lasting satisfaction of customers in Greater Montreal.