Is there any console cheat that I could use to make my companions immortal? I tried looking at different sites with no luck.
very simple actually
be sure you have companion in view
then in console do a getav health
then you see the companions health
then you do a setav health 10000 for example
check again with getav health if it changed
your companion wont die that soon anymore
you can also do a modav health 10000
which i believe sets it then permanently