Coin operated gas dryer will not stop by timer

[LEFT]Gas Dryer is Sears commerical coin operated. Without inserting the coin, when door is closed and push the start switch it starts and it is going and going. It will not stop unless you open the door. Took out the slide activated timer and examined the timer motor and timer switch and they seems functioning properely. So what else would caused the dryer to running continually??

Bob Y[/LEFT]

I’m having the same problem, did the same as Robert Yang. Please help
Thanks in advance

Anyone have the answer to this? I have two of these units, one exhibits this symptom intermittently. Does the timer signal come from a circuit on the display panel?

Thanks