dryer runs continuously

This is a coin operated electric dryer. When it is started, the minutes display shows 45 and the light on the top panel is on for “cooling down” instead of “drying”. The heat cycles on and off and the time display counts down normally to 1 minute and remains at 1 minute, and the dryer continues to run and heat and doesn’t shut off. I’m suspecting the timer is the issue. Any assistance would be appreciated.
Thank you.