The good news is that if the dryer didnâ€™t heat in the automatic cycle then the timer will not advance. The not heating is most likely the cause of the timer not advancing.
I recommend checking and repairing the heating problem first. Once the heat is repaired the timer may work okay.
If an electric dryer is running and not heating the first thing I recommend doing is to check and cycle the circuit breakers for the dryer on and off. It is possible of one leg of the voltage to be missing so the dryer will run but not heat. If you have access to a volt/ohm meter you can verify voltage at the terminal block. Use extreme caution checking this on only if you are comfortable and confident using a meter.
The image below contains the wiring diagram for this dryer and I include it so you can see the path the voltage takes from the timer to the element. If an electric dryer is not heating then there are several possible causes. It can be no voltage from the timer or a defective thermal cut-off, thermostat, hi-limit thermostat or the element itself.
All are located in the back of the dryer behind the rear panel and each can be checked with a volt/ohm meter for continuity. All are normally closed and if any are open then replace it.
I hope this information is helpful resolving your problem but if you have any additional questions then submit another question with additional details for further assistance.