Correct. There are twothings need to be done to open that door. I would suggest you contiue to explore.
- Steam courses Through the doors
- Perhaps a valve can help
- There are door locks in place
- Perhaps further exploration could yeild a security office?
- The door needs a key to be unlocked
- (Hideout Key)
I'm sure with more searching, you'll find it. Also, you are doing amazing. You've made amazing progress.