i found a random video on how a furnace can be automated
and built this machine.
here is the video on automated furnace
here is the world download for this machine if you wanna play with it
world download: http://adf.ly/OgaeM
this is a good idd to do in jore base i just build it but i also put in a of/on function so wen i dont have anyting to do whit them i can turn it of you can do it by using data his lock for piston door tecneek (dont forget to put in a jumpstart buton)