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![Activate Door Vault 3 Activate Door Vault 3](https://d1u5p3l4wpay3k.cloudfront.net/fallout_gamepedia/thumb/8/80/Fo3_Vault_92_Living_Quarters_Map.png/300px-Fo3_Vault_92_Living_Quarters_Map.png?version=c2ccd0c405060d7def37f02b39764de4)
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![Gun Vault Doors Gun Vault Doors](https://i.ytimg.com/vi/z7oiEpOpsXA/mqdefault.jpg)
Vault 101 Door No, you cannot blow Vault 101's door open. You should be able to with the Fat Man, MIRV, or Missile Launcher, but you can't. How do i open the door to vault 3. There a control box outside the door to the left as you are looking at the entrance to V3 walk up to it and activate.