The Utility Closet Fusebox is one of the more complex puzzles inBlue Prince. It features a V.A.C system with color-changing indicators. Pressing buttons randomly won’t work since this is a lengthy puzzle that relies on clues hidden in the manor’s other rooms.

In this guide, you’ll learn everything you need to know about the Breaker Box puzzle, including how the fusebox works, where to find the clues for the V.A.C indicators, and what rewards you can unlock by drafting the Utility Closet. Cracking the Breaker Box puzzle also unlocks a permanent upgrade, so it’s definitely worth your time and effort.

Three rooms on the blueprints: Lavatory, Utility Closet, and Hallway.

Why You Need To Solve The Utility Closet Fusebox

Solving the Utility Closet Fusebox V.A.C puzzleunlocks access to the Gemstone Cavern, a permanent feature thatgives you two gems at the start of each day.This upgrade is incredibly useful, as many rooms in the manor require gems to unlock.

Even a single gem can be the difference between exploring a room full of branching paths and hitting a dead end that forces you into starting a new day.

A green fusebox in a brick room.

Drafting the Utility Closet alsogives you control over:

V.A.C Indicator Hints

To solve the Utility Closet Fusebox puzzle, there aretwo rooms where you can find hints for the V.A.C buttons:

You don’t need to find these clues in-game to complete the puzzle. You also don’t have to find all the hints in a single run. If you already know the correct V.A.C sequence, you can skip the search and enter the solution directly. Just follow the steps in the “How To Solve The Utility Closet Breaker Box Puzzle” section of this guide.

Blue Prince Mail Room Hint

The Office Hints

To find the hints for the Utility Closet Fusebox puzzle, head to the computer in the Office. Select“Login to Network”and enter theTerminal Password.

The Terminal Password is ‘swansong.’ You can find this password crossed out on Staff Notices scattered around the manor, including:

Six gray indicators, numbered from one through six.

You’ll need a Magnifying Glassto read the crossed-out Terminal Password on the Staff Notices.

Capitalization doesn’t matterwhen entering the password.You also don’t need to discover it in-gameto access the network.

The Terminal Password is thesame for every computer in the manor, and it doesn’t change. Once you know it, you can use it anytime.

After logging into the network, you’ll see options like Staff Services and Remote Terminal Access, but for solving the Breaker Box puzzle,only “Electronic Mail” matters.You’ll find two key messages:

That’s every hint you can find in The Office regarding the Breaker Box.

Mail Room Hint

The hint in the Mail Room is much more straightforward. Justdraft the Mail Roomand look for aletter titled “Utility Room Fusebox.”This document breaks down how the color-mixing mechanics work for the puzzle. Here’s a quick summary of the key points:

How To Solve The Utility Closet Breaker Box Puzzle

To solve the Breaker Box puzzle, set the V.A.C indicators in the following order:

Gray → Blue → Green → White → Red → Purple

In the image below,the indicators are labeled one through sixto help you easily identify which indicator to press during each step of the puzzle:

Here are the steps you need to take:

And you’re done. Once the puzzle is complete, the wall behind the Fusebox will lift. Walk around the Fusebox to find a yellow lever with a lightning symbol.

Flip the leverto unlock the Gemstone Cavern.Starting the next in-game day, you’ll receive two gems daily as a reward for completing the V.A.C indicator puzzle.