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How do I troubleshoot Kenmore Elite 721 Model Electric Range that is displaying F19 error code?

The range could not be heating due to a voltage supply problem. The upper oven elements and surface burners can heat up. If there isn't any heat, check the house circuit breakers because the range may not be getting as much power as it should. It's difficult to tell whether a breaker tripped when both circuit breakers are reset. Check the power cord wire connections on the terminal block if the range elements don't heat up after the breakers. Remove any wires that are loose. If you find a damaged power cord, replace it. If you don't find any problems with the power cord or circuit breakers, then you will probably need to have a service technician diagnose and fix the problem, but they will need to perform live voltage checks that are dangerous if not done correctly. Plug the range and check the wire harness connections between the lower bake element and the relay control board if the lower oven elements won't heat. Fix broken wires and connect loose wires. The lower bake element's resistance can be measured using a multimeter. The bake element should be used to measure resistance. If you measure infinite resistance replace the bake element. The resistance of the lower oven temperature sensor should be checked if the lower bake element is ok. You should measure the ohms at room temperature. The lower oven temperature sensor should be replaced if resistance is off.

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