Provide a replacement or a full refund if the product cannot be repaired. Provide warranty service without requiring the buyer first to mail a registration card. Not limit the duration of implied warranties. Any warranty that does not meet those criteria is a limited warranty. Written warranties have to be clearly labeled as one or the other.
Most warranties are limited and only permit returns of merchandise that really is defective.
That's understandable, and usually you can get a defective product replaced or repaired easily, as long as it's within the warranty period. For more information The Magnuson-Moss Warranty Act makes breach of warranty a violation of federal law and gives consumers certain rights, including the right to read a warranty before purchase. Warranty laws differ from state to state. Its guide to the Magnuson-Moss Act is written for businesses but has useful information for consumers. Understanding Warranties is also helpful.