Repair of a Sharp wall-mounted heat pump in Sainte-Julie

A summer evening where the coolness was long overdue

At AirGreen , we were recently called to intervene in Sainte-Julie , on the South Shore of Montreal , for a problem with a Sharp wall-mounted heat pump that refused to start when the heat was at its peak. Installed on the balcony of a modern condo, this Sharp outdoor unit showed clear signs of electrical failure and an intermittent refusal to turn on .

Initial diagnosis: sporadic power failure

Our technician performed a complete inspection of the Sharp system . At first glance, the compressor appeared to be in good condition and no abnormal noises were noticeable. However, the unit remained silent upon startup, despite the request sent by the internal remote control.

So we checked:

• The supply voltage at the electrical terminal block,

• The integrity of the wiring between the indoor and outdoor units ,

• And the internal fuses of the power module.

The result: a slightly oxidized communication wire , probably a consequence of the moisture accumulated on the balcony exposed to the elements. This oxidation prevented the correct transmission of the signal between the two modules.

Repair: cleaning, replacement and reactivation

To restore the system:

1. We replaced the communication cable between the units.

2. Cleaned the connectors using a protective dielectric product .

3. Checked the main control board for secondary damage.

4. Restarted the system under monitoring to confirm the return of a stable operating cycle .

Upon restart, the Sharp heat pump resumed smooth operation, with rapid compressor start-up and air temperature within manufacturer specifications.

Preventive maintenance and additional adjustments

To ensure the longevity of the system, we also have:

• Cleaned the condenser fins and the condensate drain .

• Checked the refrigerant level and evaporating pressure .

• Reset the indoor temperature sensor calibration settings.

Preventive maintenance is crucial, especially in partially covered outdoor environments such as balconies, where moisture and corrosion can affect electrical connections.

Result: a restored comfort system

At the end of the intervention, the customer was able to regain efficient and consistent cooling . The Sharp unit, renowned for its reliability and energy efficiency , demonstrated that with proper maintenance and targeted repair, it could provide several more years of optimal service.

Why trust AirGreen for your Sharp systems

Sharp HVAC systems are distinguished by their quiet efficiency and durability. However, like any electronic device exposed to the Quebec climate, they require special attention during power outages or fluctuations.

At AirGreen , we specialize in the repair, maintenance, and installation of Sharp wall-mounted heat pumps . Our certified technicians provide:

• Accurate and rapid diagnostics ;

• Exclusive use of genuine Sharp parts ;

• Interventions compliant with Canadian CSA and RBQ standards ;

• Complete coverage of Montreal, Laval, Longueuil, the North Shore and the South Shore .

AirGreen Maintenance Tips for Wall-Mounted Heat Pumps

To avoid similar failures:

• Regularly inspect external cables and connection points .

• Protect your unit from water infiltration with a shelter or protective plate.

• Clean the internal filters every 3 to 4 weeks during the summer season.

• Have the pressure and electrical connections checked at least once a year by a certified professional.

These simple actions can prevent up to 70% of common breakdowns and significantly extend the lifespan of your equipment.

Thanks to a quick and meticulous intervention, AirGreen brought this Sharp heat pump in Sainte-Julie back to life. A service that perfectly illustrates our mission: to ensure the comfort and peace of mind of our customers , regardless of the brand or complexity of the system.