Originally thought belt was broken, but how to video for belt replacement was for a newer version of the dryer and disassembly instructions were not totally accurate. Followed disassembly instructions for the replacement for belt motor switch which were closer for the dryer I have. Upon disassembly discovered problem was the broken idler pulley. I ordered the pulley and a replacement belt that night and was promised next day shipment. The parts not only shipped as promised, but also showed up a day later. I installed the new parts and partially reassembled the dryer. After getting an error code, I found one connector not fully seated (my fault), After firmly seating the connector, the dryer worked like new. Finished assembly with the top and bottom covers.
When disassembling an older dryer, I recommend removing the lint duct and vacuuming the fan blades which were full of lint.