Air conditioner (A/C) is a device which used for cooling or heating. In this paper, we are working to enhance the re-manufacturing processes for the A/C window type unit by using the failure mode and effect analysis approach (FMEA) to estimate the values of risk priority number (RPN) by assigning the associated factors, the first factor is severity (S), the second factor is probability of occurrence (O), the third factor is detectability of the failure mode (D) and re-evaluate them by setting recommendations to reduce those factors as possible and estimates the new values of RPN. Those recommended actions would help the A/Cs window type manufacturer or local agents supply chain (SC) for their responsibilities to re-manufacturing processes by letting the decision-making process much easier by performing the role of the reverse supply chain (RSC). The idea behind the re-manufacturing is to activate the re-using of an older A/Cs unit to produce refurbished models that considered like a new product or better than new.