La. Civ. Code art. 2694
Current with operative changes from the 2024 Third Special Legislative Session
If the lessor fails to perform his obligation to make necessary repairs within a reasonable time after demand by the lessee, the lessee may cause them to be made. The lessee may demand immediate reimbursement of the amount expended for the repair or apply that amount to the payment of rent, but only to the extent that the repair was necessary and the expended amount was reasonable.
La. C.C. § 2694