Is a landlord required ot put in new carpet when the previous tenent moves out regardless of how long he/she resided there

First ANY question on law needs to include your general locale as laws vary by area.

But generally, there is no such requirement.

Thank you scott

Are you the renter or landlord? Are you having some issue

No.
Only HUD and Section 8 and other publicly monitored rentals have rules about such things.