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Réparation d’une thermopompe murale Goodman à Saint-Bruno
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Repair of a Goodman wall-mounted heat pump in Saint-Bruno

A sudden loss of performance in air conditioning mode

At AirGreen , we were recently contacted by a couple living in Saint-Bruno-de-Montarville , on the South Shore of Montreal , for a partial failure of a Goodman wall-mounted heat pump . The unit, installed in a master bedroom, was no longer producing cold air despite an indicator light indicating normal operation.

This type of situation is common at the beginning of the warm season, when wall-mounted units restart after several months of inactivity. In this specific case, the customer noticed a gradual decrease in cold airflow accompanied by an abnormal drip under the front panel—a typical sign of a drainage problem or a clogged heat exchanger.

In-depth diagnosis and system inspection

Upon our arrival, our technician undertook a complete diagnosis of the HVAC system , following the AirGreen method:

  • Checking electrical parameters : stable power supply, no overvoltage.

  • Inspection of the air filter and evaporator : noticeable accumulation of dust and textile fibers, reducing air passage.

  • Condensate drain observation : presence of a partial blockage in the drain pipe, causing overflow and weakening of the air flow.

  • External compressor check : refrigerant pressures compliant, no signs of leakage.

The diagnosis confirmed that the loss of performance was due to incomplete cooling due to poor air circulation in the indoor unit.

Repair and recommissioning of the heat pump

Our team carried out an in-depth intervention to restore the proper functioning of the system:

  1. Complete cleaning of the evaporator and tangential fan using a specialized biodegradable product.

  2. Unclogging the condensate drain using a reverse pressure vacuum and a diluted peroxide rinse.

  3. Disinfection of the condensate tray to eliminate organic residues and prevent unpleasant odors.

  4. Electronic reset of the unit and check of the interior temperature sensor.

Once the wall-mounted heat pump was reassembled and restarted, the blowing temperature dropped to 11°C , confirming the return to optimal operation.

Recommended maintenance and long-term prevention

Our technicians took advantage of the intervention to inform the customer about good preventive maintenance practices :

  • Clean the filters once a month during the summer season.

  • Check that the drain is flowing properly after each period of prolonged humidity.

  • Avoid placing objects under the wall unit to avoid obstructing ventilation.

  • Schedule annual professional maintenance to prevent coil clogs and extend the life of the unit.

We also checked the communication between the indoor unit and the outdoor compressor, ensuring perfect synchronization of the heating and cooling cycles.

Result: comfort and efficiency restored

Thanks to a targeted and preventative repair , the Goodman wall-mounted heat pump in this Saint-Bruno home is operating at full capacity again. The couple has regained consistent, quiet comfort while avoiding a more costly breakdown in the long term.

At AirGreen , we know that simple preventative maintenance can make all the difference between a high-performance system and an emergency repair. That's why our teams respond quickly and efficiently across the South Shore , as well as in Montreal, Laval and the North Shore , to ensure the reliability and longevity of your HVAC equipment.