Here from the SI site, in their FAQ section, is the return and warranty information you are looking for. I hope this helps.
Q: What is the return and warranty policy?
A: 30-Day Money Back Guarantee: We accept returns for replacement or a full refund 30 calendar days after delivery of the product. At our sole discretion after 30 calendar days, we will offer a replacement or a full refund. Items must be in "new, unaltered and unused condition". Definition of new, unaltered and unused condition is: without showing signs of wear or damage in any way. If an item is received damaged or is incorrectly shipped by us please contact Customer Service immediately. Refunds are contingent upon inspection of item(s) once we receive it. Customer is responsible for all shipping costs.
Original Owner Limited Warranty Parts and Labor Only: This product is warranted against manufacturing defects in materials and workmanship for three year from the date of delivery to original owner. Within this period Smokin-It, LLC will send replacement parts for your product without charge. Simply contact us at firstname.lastname@example.org, or the phone number listed below.
Contact Us: P.O. Box 13423, 2711 West Market Street, Fairlawn, OH 44333.
Call, email or text any time to: 260-417-9951.