** We can set it at any time and it will run for that time but not shut off. It moves to cooldown and stays there continuing to run. **
** series 80 Kenmore electric dryer. Any thoughts? **
That is not enough information to identify the appliance in question. What is needed is the unit's complete model number *as printed on the appliance's model and serial number tag* so we can see how it was designed (they're not all the same) and which features it has which could cause problems.
You can find tips for locating the model and serial number tag on your appliances in the 'Repair Parts' section of my site linked below.