I have a woodfurnace that has a 1/3hp 4 speed direct drive blower. Off the blower in the access panel in the rear is a distribution block that allows for me to change speeds on it with a wire. I'm looking for a switch that I could wire into that block that allows me to set the speed without having to remove the access panel. I'm looking for something thats inexpensive that will work. In the fall and spring I want to set the blower on low, but in the dead of winter I want high speed to match the higher output of the furnace. Thanks.