Locate the label on the outer surface of the equipment for a manufacture date. If the equipment is less than five years old it may have a warranty, but also may not base on the model. Warranty terms and conditions change by manufacturer and the installing company. You can also contact to your dealer, or check the bills you got on purchasing time some time it is mentioned here but not always. You can also go through online if your product has registered. Or better to contact your installing company.