Mass Effect Andromeda's Havarl Vault is a very effective way to raise the planet's viability, so you should pay the dungeon a visit as soon as you can if you hope to make the surface habitable.
Before you can access it, however, you'll need to handle the Havarl Monoliths and their glyph locations and puzzles first, which we'll explain in detail here. You'll do this as part of the Havarl: A Dying Planet quest.
Havarl Monolith and Glyphs
Havarl is a little different - there's only a single monolith puzzle which forms part of the quest Helping Havarl's Scientists, the second monolith is already active, and the third is accessed via the quest Havarl: A Dying Planet.
Want more help? Our Mass Effect Andromeda walkthrough and guide provides steps to completing every main mission, and our on-going Remnant Decryption puzzle solutions can help with the many Sudoku-like challenges the game can throw at you. Meanwhile, we can help with Memory Trigger locations, Architect locations and the hidden Fusion Mod of Adrenaline, as well as helping you decide on the many Mass Effect Andromeda Romance options for both male and female Ryder.
Havarl's vault is visited during the quest Havarl: A Dying Planet. Head inside, make your way to the lower level, and activate the main console
To unlock the door, activate the four smaller terminals in order, from the point of view of the main console:
- Front left
- Back left
- Front right
- Back right
The purification chamber is immediately through the door.
Once activated the door will close again and you'll have to kill all the remnant that appear before you can get out - there are several Nullifiers here - tackle them either by jumping and then hovering to give you a vantage point over the top of their shields, or by sniping through the small gaps in the shields - you won't have time to knock the shields out on all of them.
Once the Remnant are down, leave the room and hit the switch to close the door behind you.