Based on your symptom and details the most likely failure is the lack of line 2 (L2) voltage supply to the dryer. This is likely due to one of the two dedicated circuit breakers being tripped. It could be timer failure but not likely. I added the wiring diagram in the image below. Your timer and heating element requires a 220-240 voltage supply in order to produce heat and for the timer to advance. Locate the two (2) house circuit breakers dedicated for the dryer and reset both circuit breakers by flipping them both OFF and back ON 2-3 times and then check the dryer for heat. If it heats then the timer will likely advanced too. If it does not heat and the timer does not advance then it could have a burnt line 2 (L2) voltage supply wire connection at the dryer terminal block where the power cord is attached to the dryer.
NOTE: Disconnect the power cord from the power source before checking for a burnt wire at the terminal block on the dryer.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services