My kenmore dryer wont't heat up the model is 11070842990 everything works but it doesn't heat up

This is a gas dryer, correct? Does the flame come on? Check the cucling switch.sensor and hi-limit switch for continuity. If any doesn't show cont. replace. This is assuming that the flame is coming on. If it is not coming on youy will need to check the ignitor or pilot and the coils ion the gas valve