All new Whirlpool appliances, including ovens, come with a 12-month manufacturer's warranty, as of 2015. If the oven needs a repair during that time frame, calling the number in the warranty documentation is the first step to scheduling service.
Whirlpool also sells extended warranties to cover their ovens after the initial period expires. Also, homeowner's warranties are available from a number of different companies that offer protection for appliances if desired. A third option is to self-insure by gradually saving for the cost of a new oven after the manufacturer's warranty expires, rather than paying for repairs or for extended warranty coverage.