An oven that won't heat is usually the result of a faulty igniter (for a gas oven) or heating element (for an electric oven). If both your gas oven and your gas burners have stopped working, the problem is most likely with the gas line, and will require professional repair.
How do I reset my Magic Chef oven?
To reset a Magic Chef RV oven, disconnect power to it by resetting the circuit breaker. Wait for 30 seconds, then restore power to it.