Setting a Honeywell Limit Control on a Furnace

Locate the "Fan Off" lever and move it to the temperature at which you wish the circulation fan to stop moving. The "Fan Off" level is located on the bottom left of the limit controller.

Insert the small end of the limit adjust tool into the hole located above the word "Caution" on the limit controller.

Insert the other end of the limit adjust tool next to the limit stop marker on the temperature scale across the bottom of the limit controller.

Move the limit stop marker with the limit adjust tool clockwise to lower the temperature stop setting and counterclockwise to raise the temperature stop setting. Once you remove the limit adjust tool, the furnace is set to shut off its main burner when the furnace's internal temperature exceeds the temperature you have set on the limit controller.