Kenmore Washer heavy duty 70 Series not spinning and agitating (model 110.828741200. What could be the issue? Thanks.

If it just fills then quits, no sound, then the lid switch is probably bad. This is one of my most frequent appliance repairs. Here is a link to get at switch.
YouTube - Washing Machine Drive Tub Seal Replacement Whirlpool and Kenmore (part #383727)

Hope this helps,
Rich
Western Appliance Repair of Boise
Western Appliance Repair of Boise 208-863-3702