Samsung wall-mounted air conditioner repair in Plateau-Mont-Royal

A service call in a Montreal condo

At AirGreen , we regularly work in modern apartments and condominiums in the Plateau-Mont-Royal region , where Samsung wall-mounted air conditioners are often used for their reliability and compact design. Our client today contacted us after noticing that their unit was no longer producing cold air, even after a complete system restart.

Initial diagnosis: an overheating device and a faulty temperature sensor

Upon our arrival, our technician performed a complete diagnosis of the Samsung wall-mounted air conditioner , a model of approximately 12,000 BTU installed in the condo's open-concept kitchen-living room.
Here's what we found:

• The indoor fan was working, but the outdoor compressor was no longer starting .

• The wall unit's LED was flashing in sequence, signaling a temperature sensor (thermistor) error .

• The indoor sensor was measuring incorrect temperatures, preventing the unit from starting the cooling cycle.

• The unit also exhibited dust buildup on the coils , contributing to overheating.

This type of failure is common on Samsung units after several years of use without preventive maintenance.

AirGreen intervention: complete repair and system upgrade

Our technicians have undertaken the following steps:

1. Power off and completely disassemble the front housing to access the electronic module.

2. Test the probes using a multimeter to confirm the indoor temperature sensor failure.

3. Replacement of the thermistor sensor with a genuine Samsung part, reinstalled and calibrated to the manufacturer's nominal values.

4. Complete cleaning of the evaporator and tangential fan using a biodegradable cleaner designed for residential HVAC systems.

5. Electronic system reset , followed by a complete test of the cold and hot cycles.

Once these steps were completed, the air conditioner resumed stable and quiet operation.

Result: efficiency restored and comfort restored

After the intervention, the customer immediately noticed a constant flow of fresh air and a reduced noise level . The performance measured by our instruments confirmed optimal efficiency , with a temperature differential of more than 10 °C between the air inlet and outlet.

We also advised the client:

• To clean the filters every 2 to 3 months ;

• To schedule an annual professional interview before the hot season;

• Avoid leaving the appliance running unattended for extended periods of extreme heat.

AirGreen Expertise: The Difference of Certified Maintenance

Samsung wall-mounted air conditioners are known for their durability, but their sensitive electronics require regular maintenance and precise repairs. At AirGreen, our technicians (RBQ licence 5645-9605-01) have full command of the control circuits, R410A refrigerant pressures and sensor settings.

We operate throughout Greater Montreal , including Plateau-Mont-Royal, Laval, Longueuil, the North Shore and the South Shore , to guarantee each client lasting comfort and optimal performance of their HVAC system.