Repair of a Sanyo wall-mounted heat pump in Laval-des-Rapides

A sudden breakdown in the middle of spring: when the system stops blowing

At AirGreen , we often receive calls as temperatures begin to rise. This was the case in an apartment in Laval-des-Rapides , where a customer contacted us about a blower problem on their Sanyo wall-mounted heat pump . The unit, although robust and reliable for several years, was no longer blowing air despite the outdoor compressor starting.

Initial Inspection: Understanding the Symptoms

Upon arrival, we noticed that the Sanyo indoor unit, installed above a sofa in the main living room, was displaying the usual operating lights. However, there was no airflow coming out of the grilles, a sign of a stopped indoor fan .

Our technicians have started the complete diagnosis:

• Check the power supply and internal fuse.

• Inspection of the electronic control board.

• Fan motor control (contactless brushed DC motor).

• Voltage test on the power supply module.

Diagnosis confirmed: defective blower motor

Tests revealed that the indoor fan motor had stopped responding to electrical impulses from the main board. The cause: an internal short circuit due to the accumulation of dust and moisture in the motor's rear bearing. This type of failure is common on Sanyo models from the 2010s , especially when they haven't had a thorough cleaning for several seasons.

We then checked the condition of the other components—temperature sensor, evaporator fin, condensate—before confirming that only the blower needed to be replaced.

Repair: Engine replacement and complete maintenance

The intervention took place in several methodical stages:

1. Safe shutdown of system power .

2. Disassembly of the front panel and fan to access the motor.

3. Removal of the old motor and complete cleaning of the squirrel cage.

4. Installation of a Sanyo compatible replacement motor , calibrated to the original voltage.

5. Complete cleaning of the evaporator and condensate tray , often neglected but essential for good air flow.

6. Reassembly and complete functional test .

Upon restart, the airflow was strong and stable. The customer immediately noticed a return to thermal comfort and a reduction in ambient noise.

Final Checks and AirGreen Recommendations

Before concluding the intervention, we performed a fan speed calibration using the original remote control, testing all three power levels. Everything worked perfectly.

We also advised the client:

• Carry out a complete maintenance of the heat pump once a year.

• Clean the air filter every two months during the operating season.

• Avoid blocking air circulation (furniture or curtains in front of the unit).

The owner, satisfied with the speed and precision of our work, decided to entrust AirGreen with the complete annual maintenance of his system.

AirGreen: the benchmark in wall-mounted heat pump repair in Laval and Greater Montreal

With our extensive expertise in Sanyo, Sharp, Gree, Midea, Fujitsu, and Lennox systems, we guarantee long-lasting repairs that comply with RBQ and CSA standards . Every service call is an opportunity for us to ensure the longevity of appliances and optimize their energy efficiency.

This intervention in Laval-des-Rapides perfectly illustrates the AirGreen philosophy: repair before replacing , while offering a transparent, fast and professional customer experience.