If I have a pot which hasn’t been used in over a year but is fleishik, I wanted to know if there is any way to kasher it so it can be pareve. If not, does anything I cook in it automatically become fleishik (even if I only use it for pareve foods)? Or can I just not mix dairy in the pot itself…?
In order to remove the fleishig stauts you should do hagalah on the pot, immersing it in a boiling pot of water. If it is to big you can boil water in it until it boils over, using a heated rock to cause it to spill over the rim.
Even before the hagalah, any food cooked in the pot remains pareve.