"My cheese sandwich is in the fridge."
Translation:Mi sándwich de queso está en la nevera.
No, "refrigerador" is masculine and must be used with "el". It is not a noun that changes genders. Most nouns do not change genders (whereas, adjectives do). The exception are nouns that tell you someone's occupation and some animals change based on the gender of the animal.
Apparently it's "la refrigeradora" in Peru
It's stuff like this that makes americans not want to learn other languages: refrigerado = refrigerator. Masculine nevera = fridge. Feminine.