When dryer cycle is time set for 60 minutes of drying time, the machine turns off before the clothes are dry. The timer moves as required and the timer has been replaced. This is an intermittent problem.

When dryer cycle is time set for 60 minutes of drying time, the machine turns off before the clothes are dry. The timer moves as required and the timer has been replaced. This is an intermittent problem.
This might be something to do with the heating element in the dyrer.