This part was removed by a certified hvac installer from a fully functioning system. The part has been inspected and was in working condition when removed. Factory date codes and serial numbers will be matched and compared to the original listing. All items will be checked to ensure the presence of our UV mark. We test all of our items for full functionality, however if there is an issue with your item, please message us and we will be be happy to work with you and find a solution or replacement.