Rapid diagnosis and expert intervention from AirGreen
At AirGreen , we were recently called to Sainte-Rose, a quiet residential neighborhood in Laval , for a problem with a Fujitsu wall-mounted heat pump . The customer contacted us after noticing that their outdoor unit was no longer starting despite the manual override and that the air blown inside remained lukewarm. This type of situation is common when the system is experiencing seasonal wear or an electrical fault with the compressor.
Initial inspection and safety checks
Upon our arrival, our certified technician performed a complete diagnostic of the Fujitsu Halcyon wall-mounted heat pump . The outdoor unit, neatly installed against the house's vinyl siding, showed no visible signs of physical damage or refrigerant leaks. However, a closer examination of the electrical circuit and connections revealed slight oxidation on the power terminal, a detail often overlooked but which can interrupt the compressor's startup.
We then checked:
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The supply voltage between the circuit breaker and the outdoor unit.
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The compressor inrush current , measured using a current clamp.
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The integrity of the thermostat wiring and indoor sensors .
These steps allowed us to confirm that the fault was caused by a faulty external control board , a typical problem on Fujitsu systems with several winters under their belt.
Replacing the control board
After obtaining the customer's approval, we proceeded to replace the electronic board. We only use genuine Fujitsu parts to ensure full compatibility with the internal components and control software.
The removal of the front panel and the disconnection of the harness were carried out with care to avoid any static damage. Once the new board was installed, a power-up test confirmed the resumption of the normal operating cycle: the outdoor fan started, followed by the compression of the R-410A gas, bringing the indoor air back to an optimal temperature in less than five minutes.
Optimization and preventive cleaning
Taking advantage of the intervention, our technician also:
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Cleaned the outdoor condenser using a gentle jet to remove accumulated debris.
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Checked refrigerant pressure to ensure stable charging.
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Inspected the condensate drain and tightened the wall protection conduit outlet.
These simple actions can significantly increase the lifespan of the heat pump and improve its energy efficiency.
The return of comfort and tranquility
The customer immediately noticed the difference: the Fujitsu system returned to a regular, quiet and efficient blowing , even in heating mode. As a bonus, power consumption was optimized, thanks to the replacement of the faulty card that was disrupting the compressor cycles.
At AirGreen, we believe that a well-executed repair is also an educational opportunity. We took the time to explain to the customer how to:
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Watch for warning signs of failure (abnormal noises, warm air, cycles that are too short).
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Maintain your internal filter to avoid overloading the system.
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Schedule annual preventative maintenance before winter to avoid emergencies during cold weather.
AirGreen Expertise in Sainte-Rose and Beyond
This service in Sainte-Rose, Laval exemplifies our commitment to providing fast, professional, and long-lasting service. Whether it's for a Fujitsu wall-mounted heat pump repair , a Gree unit installation, or a Midea system diagnosis, our technicians cover the entire Greater Montreal area, including the North Shore , the South Shore , and Montreal .
Trust AirGreen for all your heating, ventilation, and air conditioning (HVAC) needs: our mission is to ensure your comfort in all seasons, with transparency, precision, and local expertise.
Problem encountered: electrical failure of the external control board.
Solution applied: replacement of the Fujitsu electronic card, complete cleaning, functional test and verification of the refrigerant circuit.
Result: restored performance, stable system, satisfied customer.
Why choose AirGreen?
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Certified and trained technicians on Fujitsu, Gree, Midea, Sharp, and more.
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Fast service in Laval, Montreal, Longueuil, North Shore and South Shore.
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Original parts and warranties respected.
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Personalized advice to extend the life of your HVAC unit.
In conclusion, this Fujitsu heat pump repair in Sainte-Rose demonstrates that accurate diagnosis and meticulous service not only restore home comfort, but also ensure long-lasting efficiency. At AirGreen, every service call is handled with the same rigor: your comfort is our priority.