Check out this link:
A Businessperson’s Guide to Federal Warranty Law
Particularly the sections that cover Implied Warranties.
Implied warranties are unspoken, unwritten promises, created by state law, that go from you, as a seller or merchant, to your customers. Implied warranties are based upon the common law principle of "fair value for money spent," There are two types of implied warranties that occur in consumer product transactions. They are the implied warranty of merchantability and the implied warranty of fitness for a particular purpose.
Time limits on Implied Warranties:
Generally, there is no specified duration for implied warranties under state laws. However, the state statutes of limitations for breach of either an express or an implied warranty are generally four years from date of purchase. This means that buyers have four years in which to discover and seek a remedy for problems that were present in the product at the time it was sold. It does not mean that the product must last for four years. It means only that the product must be of normal durability, considering its nature and price.
Verbal Statements also affect Implied Warranties:
The implied warranty of fitness for a particular purpose is a promise that the law says you, as a seller, make when your customer relies on your advice that a product can be used for some specific purpose. For example, suppose you are an appliance retailer and a customer asks for a clothes washer that can handle 15 pounds of laundry at a time. If you recommend a particular model, and the customer buys that model on the strength of your recommendation, the law says that you have made a warranty of fitness for a particular purpose. If the model you recommended proves unable to handle 15-pound loads, even though it may effectively wash 10-pound loads, your warranty of fitness for a particular purpose is breached.
Limitations on "As Is" products:
Some states do not allow you to sell consumer products "as is." At this time, these states are Alabama, Connecticut, Kansas, Maine, Maryland, Massachusetts, Minnesota, Mississippi, New Hampshire, Vermont, Washington, West Virginia, and the District of Columbia. In those states, sellers have implied warranty obligations that cannot be avoided.
Protection of implied warranties with any explicit Warranties:
Federal law prohibits you from disclaiming implied warranties on any consumer product if you offer a written warranty for that product (see What the Magnuson-Moss Act Requires) or sell a service contract on it (see Offering Service Contracts).
You should be aware that even if you sell a product "as is" and it proves to be defective or dangerous and causes personal injury to someone, you still may be liable under the principles of product liability. Selling the product "as is" does not eliminate this liability.
