Kenmore Gas Dryer runs and stops but starts right up every time i push button

This gas dryer I have starts, then stops at random times, sometimes short times, other times just runs till the clothing is dried.

Seems to make no difference what heat setting dryer is on.

When the dryer stops the timer keeps running and will run to the end of the cycle if the start button is not pushed to start the dryer up.

When the dryer stops you can push the start button as soon as it stops and it will start again and run a random length of time.

I have already replaced the timer but it has not changed.

Any suggestions?:confused: