Effective intervention on a wall system installed at height
At AirGreen , we put our expertise to work for Greater Montreal residences to ensure consistent comfort, summer and winter. That day, our team traveled to Saint-Lambert , on the South Shore, to work on a Toshiba wall-mounted heat pump installed on a red brick wall. The outdoor unit, mounted on a galvanized steel wall bracket, had stopped working properly, causing a loss of heating mid-season.
Symptoms observed: intermittent failure and communication error
The customer contacted us after noticing that their Toshiba system was randomly shutting down. The indoor unit was displaying an error code related to faulty communication between the indoor and outdoor modules . Additionally, a vibrating noise was noted during restarts.
Upon our arrival, our technicians carried out a complete inspection :
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Checking electrical wiring and signal connectors.
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Check the supply voltage at the wall service box.
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Analysis of the external electronic card.
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Continuity test on the communication wire connecting the two units.
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Mechanical inspection of the support and installation level.
The diagnosis quickly revealed two problems:
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Oxidation of electrical connectors in the wall box, caused by exposure to moisture.
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Communication cable insulation fault , causing intermittent signal.
Complete Toshiba System Repair and Upgrade
Our certified technicians undertook a complete repair to ensure the durability of the system:
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Replacement of electrical connectors and communication wire with high quality shielded cable.
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Cleaning terminals and housings with a dielectric product to prevent future corrosion.
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Toshiba Inverter compressor check , confirming stable consumption and smooth start-up.
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Reinforced wall bracket mounting , including replacement of rusted bolts and addition of anti-vibration spacers.
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Complete system test : communication restored, heating cycle stable, and temperature within manufacturer specifications.
Result: restored reliability and assured performance
After our interventions, the Toshiba heat pump returned to impeccable operation:
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No more error codes .
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Stable communication between units.
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Reduced noise level thanks to mechanical stabilization.
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Restored energy efficiency , ensuring the customer has uniform and economical heating.
The owner also appreciated our maintenance recommendations:
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Visually inspect cables once a year.
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Avoid water accumulation under the wall box.
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Have annual preventative maintenance performed before the cold season.
AirGreen: HVAC experts serving sustainability
At AirGreen, every repair is an opportunity to optimize the performance and longevity of your HVAC systems. Our technicians have extensive expertise with brands like Toshiba, Midea, Fujitsu, Gree, Trane, and Sharp , and follow specific protocols to ensure safety and efficiency. We operate throughout Greater Montreal , including Laval, Longueuil, the South Shore, and the North Shore .
Each service call is handled with rigor: in-depth diagnosis, certified parts, total transparency , and above all, a lasting result.
Our goal: to ensure the comfort and tranquility of our customers, whatever the season.
AirGreen – Your trusted partner for heat pump repair in Montreal and the South Shore.
Precise interventions, local expertise and sustainable solutions for every home.