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Réparation d’une thermopompe murale Gree à Sainte-Julie
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Repair of a Gree wall-mounted heat pump in Sainte-Julie

Accurate diagnosis of an internal breakdown

At AirGreen , we respond weekly to HVAC repair calls related to Gree wall-mounted heat pumps , which are very popular in homes on the South Shore of Montreal . This call came from a customer in Sainte-Julie , who was concerned that his indoor unit was no longer blowing cold air, despite having a running outdoor compressor.

Background and symptoms observed

The Gree wall-mounted heat pump, installed about five years ago in an open-plan living room, showed several typical signs of failure:

  • The wall unit powered on normally, but no airflow was coming out of the fins.

  • The outdoor compressor was running, confirming that the problem was with the indoor unit .

  • No error code visible on the remote.

This type of symptom often indicates a failure of the interior ventilation motor , a mechanical blockage , or even a defective control board .

Stages of technical diagnosis

Upon our arrival, we carried out a methodical inspection :

  1. Removed the front cover and visually inspected the filters: no significant obstructions.

  2. Blower motor electrical test : no response despite power supply.

  3. Checking the electronic board using a multimeter: fluctuating voltage, irregular signal.

  4. Tangential fan inspection : free of debris and excessive dust.

Our measurements quickly confirmed that the main board of the indoor unit was defective , preventing the signal from being transmitted correctly to the blower motor.

Repair carried out

Our team replaced the original Gree electronic board , supplied by our stock of certified parts. This operation required:

  • Safe disconnection of the power supply .

  • Complete disassembly of the front panel .

  • Disconnecting internal sensors and connectors .

  • Installation of the new card and its calibration according to the manufacturer's specifications.

Once the card was replaced, we performed a full system test :

  • The unit powered back up without error.

  • The indoor fan has resumed a constant and quiet airflow .

  • The ambient temperature dropped by 2°C in less than ten minutes.

Final result

The customer was able to return to the comfort of his home in just a few hours.
We also took advantage of the visit to carry out:

  • Cleaning the filters .

  • A check of the refrigerant circuit pressures .

  • A check of the condensate drainage to avoid any future risk of water leaks.

Thanks to this rapid intervention, the Gree heat pump regained its original performance and stable operation .

Why entrust your repair to AirGreen?

Gree wall-mounted heat pumps offer remarkable reliability, but like any HVAC unit, they require specific expertise when performing electronic repairs. At AirGreen, our technicians:

  • Are trained on Gree, Fujitsu, Midea and Lennox systems .

  • Use only genuine parts to ensure durability.

  • Apply advanced security and diagnostic protocols .

We advise our customers in Sainte-Julie and the surrounding area to schedule annual maintenance , particularly before the hot summer months. This maintenance helps prevent:

  • Electronic card failures due to dust.

  • Blower motor overheats.

  • Drainage duct obstructions.

An exemplary intervention in Sainte-Julie

This project perfectly illustrates our approach: rigorous diagnosis, transparency, speed and quality of service . Each AirGreen intervention is carried out in compliance with the highest standards of the residential HVAC sector in Quebec .

Thanks to our interventions in Montreal, Laval, Longueuil, on the North Shore and the South Shore , we maintain hundreds of efficient and quiet heat pumps, even after years of use.