No copper

The blast furnace cant make molten copper. Only molten iron. I delete all my copper production and reinstalled it. but the same bug appeared. The copper recipe are selected. Only molten iron exit from the blast furnace. So no copper plate for the game.

The problem appeared after the release of update 4.

Attached: Save 2026-03-16, 12-58-04.save

There is molten iron in your molten channels

No.

All are set to copper.

@mabbe7 [discord] you sure it didn't spit out iron from a misconfigured recipe and you never cleared the channel so it's just sitting there now?

have you tried clearing the channel

and make sure the iron recipe isnt set

Yes I restart 2 games and it is the same problem. The blast furnace mal fonctionning.

Use Unity to deconstruct the channel and rebuild it

works fine for me

I did 3 times but it the same each time even if I start a new game.

I loaded your save, and all your furnaces are set for molten iron recipe

lol

yup

I changed the recipe and used unity to clean out the channels and belts and it works for me

Has someone assumed red/orange = copper perhaps?

Likely too much Factorio has ruined our sense of reality