Auto-dry setting timer does not advance

The auto-dry timer setting does not advance but the timed dryer setting does advance. I checked the timer power resistor ohm reading and it checked out at 4.9K ohms (5K resistor). So I bought a new timer and the auto-dry setting still does not advance. I have also replaced all of the heater sensors and thermostats on the dryer. This is an electric dryer. Any suggestions? Thanks!