If you have a large fridge or freezer, you may need to keep it in good working order. If your fridge or freezer is not functioning properly, it could become a food safety hazard. It can be difficult to determine whether or not your commercial refrigerator needs repair or replacement. Here are some signs that your commercial refrigerator might be malfunctioning: - The unit's temperature fluctuates frequently between hot and cold temperatures (this can result from poor insulation).