This item is not for self installation. Item must be taken to a Aurthorized RV dealership and a dianostic test must be ran by a Certified RV technician. If there is a problem we will need the Phone number of the RV dealership and technichian that replaced, repaired and installed the item for us to honor a replacement. You have 3 days after receiving your item to let us know of any problems. We will only replace the item for the exact part that you purchased. By buying our item (s) you agree to this policy.