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Réparation d’une thermopompe murale Sharp à Côte-des-Neiges–Notre-Dame-de-Grâce
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Repair of a Sharp wall-mounted heat pump in Côte-des-Neiges–Notre-Dame-de-Grâce

A Sharp Ion Plasmacluster system refurbished thanks to AirGreen expertise

Recently, our AirGreen team was called to Côte-des-Neiges–Notre-Dame-de-Grâce , in the heart of Montreal , to work on a Sharp Inverter wall-mounted heat pump equipped with Ion Plasmacluster technology . The unit, installed under a rear deck, was showing obvious signs of failure: intermittent cooling and complete compressor shutdown in extreme heat .

A typical problem with systems where the air vent is partially blocked and the control module has experienced a power surge .

First observation: a well-installed device, but poorly ventilated

Upon arrival, we noticed that the Sharp outdoor unit was mounted high up under a wooden balcony structure , which restricted the circulation of hot air exhausted by the condenser. This situation is common in Montreal homes where rear space is limited.
Result: the heat pump regularly overheated , which caused the safety shutdown of the compressor and, over time, premature wear of the inverter module .

Our technicians also observed a buildup of dust and leaves around the fins, further reducing the system's performance.

Detailed technical diagnosis

Our specialists carried out a series of precise checks:

  1. Refrigerant pressure measurement : slight deviations confirming a partial charge.

  2. Electrical continuity test on the Sharp Ion control module: detection of a faulty component (start-up resistor).

  3. Fan and thermal sensor check : normal operation, but dirt present on the external sensor.

  4. Inspection of the wiring under the terrace: section slightly damaged by humidity.

The final diagnosis: a mixed fault — both electrical and thermal — caused by poor ventilation and aging of the control circuit .

Intervention: complete system restoration

After validating the quote with the customer, our AirGreen technician undertook the following steps:

  • Replacement of the defective inverter module with an original Sharp part.

  • Complete recharge of the R410A circuit , calibrated according to the manufacturer's nominal pressures.

  • Deep cleaning of the condenser with dry steam to maximize heat transfer.

  • Repair and insulation of the exterior wiring , now protected by a sealed conduit.

  • Checking the condensate drain , often blocked under raised installations.

Once the power was restored, the Sharp Inverter system restarted with perfect pressure and current values .

Result: restored comfort and optimal performance

The customer immediately noticed consistent, quiet cooling . The Ion Plasmacluster module, which purifies the air by neutralizing particles and odors, has regained its full effectiveness.
By adjusting the ventilation of the area under the balcony, we also reduced the ambient temperature around the unit by almost 6°C , which reduces the risk of future thermal cuts.

This project perfectly illustrates the importance of proper ventilation of wall-mounted condensers , an aspect often neglected in compact residential installations.

What this intervention demonstrates

Our teams of AirGreen HVAC experts provide high-precision repairs on all Sharp, Fujitsu, Gree, Midea, Tosot, LG, Lennox, and many other systems, throughout Greater Montreal, Laval, the North Shore and the South Shore .
Every service call is based on three pillars:

  • Precise and rapid diagnosis , supported by calibrated instruments;

  • Use of original parts to preserve the manufacturer's warranty;

  • Strict compliance with RBQ and TEQ standards , guaranteeing safety and reliability.

Maintenance tips to avoid similar breakdowns

For wall-mounted heat pumps installed under a terrace or near enclosed structures:

  • Maintain a minimum clearance of 30 cm on the sides and 1 meter at the front ;

  • Clean the fins and filters every season ;

  • Have the inverter module inspected every two years;

  • Check outdoor wiring , especially in areas prone to moisture.

These simple actions help prevent costly breakdowns and extend the life of the compressor .

Conclusion

Thanks to the meticulous work of our team, the Sharp Ion Plasmacluster heat pump in Côte-des-Neiges–Notre-Dame-de-Grâce has regained its full efficiency.
The customer once again benefits from stable comfort, purified air and controlled energy consumption .
At AirGreen , we pride ourselves on ensuring the long-lasting performance of your wall-mounted and multi-zone HVAC systems throughout the metropolitan area.

AirGreen – Experts in repairing Sharp heat pumps and residential and commercial HVAC systems in Greater Montreal.