Chosen Solution

my oven turns on and heats for about 4 minutes then shuts off??

If its an electric i can say this is a thermal fuse problem. Usually the one on top of the oven basket. These are round fuses and can be checked by connecting a continuity tester on it and placing it on the stove. Have a thermostat on there too. The heat should match the rating and it will then disconnect the current when it reaches its designed temperature. These are cheap to replace and will be the best bet.