Are there expired DUCTWORKS codes?
No expired codes are recorded in this archive. That limited record does not prove that DUCTWORKS has never issued or retired a code.
Why do videos list expired DUCTWORKS codes?
A video may contain an old, mistaken, copied, or unsupported claim. Check its cited source and the exact game before accepting or rejecting a code; absence from this archive is not proof that a video is false.
What should you do instead?
Play the published loop, open the codes hub, and ignore browser forms that ask you to type a string.