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How to Activate the Boiler Room in Blue Prince

A step-by-step guide to activating all three Boiler Room tanks in Blue Prince, reaching tank C, and routing steam to a connected room.
WorldBlue Prince Length2 min Posted Quest giverVGSources Team
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Activate tanks A, B, and C, route their steam into the main tank, then press ACTIVATE at the upper-floor control panel. After the Boiler Room starts, use the panel switch to send steam through one selected doorway at a time.

Before you start

The Boiler Room must be drafted for its power system to function. Its job is to supply steam power to connected rooms; the Room Directory describes it as “A utility room serving as a central hub for controlling the heating and steam power supplied to various rooms of the estate,” as quoted on the Blue Prince Wiki.

How to activate the Boiler Room

  1. Activate tank A

    Interact with tank A’s red gauge to turn it on.

  2. Expose and activate tank B

    Set switcher 1 so tank A feeds switcher 2. Turn switcher 2 until steam runs the conveyor in front of tank B. Change the connection to stop the conveyor and expose tank B’s gauge, then interact with the gauge. If it is still blocked, adjust switcher 2 to cycle the conveyor until the gauge is accessible.

  3. Use the elevator to reach tank C

    Route tank B’s steam to power the elevator, then ride it to the upper floor. Activate tank C there. The Blue Prince Wiki says this also opens the sealed door.

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    #1 Best Overall
    Blue Prince Day One Edition - PlayStation 5
    • DRAFTING YOUR JOURNEY - Upon reaching a closed door in Mt. Holly, you decide what room appears behind it and each decision shapes your path as you navigate through the manor. Every door can reveal new and exciting chambers that contain their own unique challenges and secrets. But be careful how you draft, for each day the manor’s floor plan resets and the rooms you saw today may not be the same rooms you see tomorrow.
    • EVERY STEP COUNTS - Your progress each day is shaped by the rooms you select to draft and the tools you find within them. Items in the game can be used in a number of creative ways to fuel your exploration deeper into the house, allowing you to adopt unique strategies to combat the challenges that each day brings.
    • A HISTORY IN THE MAKING - As the heir of Mt. Holly, you have been tasked to explore its shifting halls in search of Room 46. Yet as your journey takes you further into the mansion’s depths, you start to discover that there is more lurking under the surface than a missing room. Investigate a past woven with the threads of blackmail, political intrigue, and the mysterious disappearance of a local children’s book author.
    • DAY ONE EDITION BONUSES - Pack-in bonuses include 18” x 12” fold-out poster of the magnificent Mt. Holly Manor and a download code for the official game soundtrack.
  4. Route the tanks into the main tank

    Set tank C’s lever toward the main tank. Return to the lower floor and configure the switchers to extend the bridge, then set tank B’s lever to feed the main tank. Check the control panel: all three tank indicators should be lit.

  5. Start the system

    Go to the upper-floor control panel and press ACTIVATE. The sequence is also described in the GameSpot Boiler Room guide, which likewise identifies the active tanks as a prerequisite for the final button press.

    Rank #2
    Blue Prince - PS5
    • The physical edition will include a fold-out poster of the magnificent Mt. Holly Manor
    • Additionally, all pre-orders will include a download code for the official game soundtrack. This code will be included on a voucher inside the game pack for all D1 orders
    • DRAFTING YOUR JOURNEY - Upon reaching a closed door in Mt. Holly, you decide what room appears behind it and each decision shapes your path as you navigate through the manor. Every door can reveal new and exciting chambers that contain their own unique challenges and secrets
    • EVERY STEP COUNTS - Your progress each day is shaped by the rooms you select to draft and the tools you find within them. Items in the game can be used in a number of creative ways to fuel your exploration deeper into the house, allowing you to adopt unique strategies to combat the challenges that each day brings
    • A HISTORY IN THE MAKING - As the heir of Mt. Holly, you have been tasked to explore its shifting halls in search of Room 46. Yet as your journey takes you further into the mansion’s depths, you start to discover that there is more lurking under the surface than a missing room

Route steam to a room

Starting the Boiler Room and choosing where its steam goes are separate actions. Once the system is active, use the control-panel switch to select a doorway. Steam is routed through one doorway at a time; the Blue Prince Wiki lists the Laboratory and Pump Room among the rooms that can use Boiler Room power. Choose the connected destination that serves the room or puzzle you want to power.

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What happens after activation

The Blue Prince Wiki reports that the machine stays powered for the rest of the in-game day even if a tank’s steam supply is later cut. It also says the installed components make reactivation easier on later days. Those are guide descriptions of the game’s behavior, rather than developer-confirmed instructions.

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Quick Recap

Bestseller No. 2
Blue Prince - PS5
Blue Prince - PS5
The physical edition will include a fold-out poster of the magnificent Mt. Holly Manor
$44.80
Bestseller No. 3
Bestseller No. 4
Blue Prince Life Sim Game 26
Blue Prince Life Sim Game 26
Royal prince life simulation; Explore palace and kingdom areas; Training, missions, and daily tasks
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Rank #4
Blue Prince Life Sim Game 26
  • Royal prince life simulation
  • Explore palace and kingdom areas
  • Training, missions, and daily tasks
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Rank #3
Blue Prince - P5
  • Brand new. UK Import PAL version. Game in English. UK PSN account may be required for any online features.

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