If ice cubes are left in a freezer for a long time without any changes to the freezer's temperature or power supply, they would eventually melt. However, the time it takes for the ice cubes to melt depends on various factors such as the freezer's temperature, insulation, and the size of the ice cubes.
Freezers are designed to maintain temperatures below the freezing point of water, typically around 0 degrees Celsius (32 degrees Fahrenheit). The lower the temperature, the slower the ice cubes will melt. Additionally, freezers are well-insulated to minimize heat transfer from the surrounding environment.
If the freezer remains functional and the temperature is consistently below freezing, the ice cubes will stay frozen for an extended period. However, over an extended period of time, some ice cubes may experience a process known as sublimation. Sublimation occurs when a solid directly transitions into a gas without passing through the liquid phase. In the case of ice cubes, sublimation would cause them to slowly shrink in size as the ice vaporizes.
Ultimately, in normal freezer conditions, ice cubes will eventually melt due to a combination of factors such as sublimation and slow heat transfer. However, this process would generally take a significant amount of time.