Trying to install a new Blower into a 20+ year old Weather King furnace, the blower will not turn off after all wires are connected, and thermostat is set, the thermostat is as old as the furnace and does not have an auto switch, it is just a dial thermostat. What can we do or what are we doing wrong??

The relay could be stuck. Many times you can shut the power off and tap it with s screw driver handle and it will solve problem temporarly. If the relay is sticking it will need to be replaced. Not expensive,though