Freezers and refrigerators might struggle in colder months in unheated garages during winter in Seattle. Refrigerators are designed to work in common home temperatures, so the refrigerant and compressor might not be able to work efficiently.
Refrigerators compress refrigerant, which heats it up. After the refrigerant cools to room temperature, it is allowed to expand, which produces cool air that can be spread through the refrigerator. Cold outdoor temperatures might cause the refrigerant to move sluggishly. In addition, ice might build on the outside of the refrigerator, which can freeze fans and other components. If the temperature drops below the freezing point, items in the refrigerator might freeze, which can damage some foods.