****There is no “d” in the word, “refrigerator”.****
I think what you’re hearing isn’t always a “d” — sometimes it’s an unaspirated “t” sound.
Anyway, it’s the way most Americans talk in everyday life, including yours truly. Moreover, if you go to the trouble of articulating a truly aspirated “t” consonant in that position, IMHO you’ll be sounding either like a foreigner or like a pretentious young TV news reader.
Sorry...I was referring to the spelling, not the pronunciation. A lot of folks spell it “refridgerator”
Drawsing was commenting on spelling - I wandered off into English spelling vs. American spelling (which often differs)and then into enunciation.
Check the UK Daily Mail vs. NY Post for variations in common word spelling.