How does my unit get repaired if it is under warranty? Call your warranty representative at 800-827-0132 Extension 313 or 301. Please have your VIN number of the trailer available and any pictures or additional information. Once we have determined that an issue qualifies for warranty, we will get you to a Cottrell Authorized Warranty Repair Facility or to Cottrell. We will then communicate with the facility to ensure any warranty work has been pre-authorized. Work performed at a shop that is NOT a Cottrell Authorized Warranty Repair Facility or that is performed without a preauthorized PO may not be covered.