Bambu Lab P2S TH Toolhead Board
$51.00
Bambu Lab P2S TH Toolhead Board
$51.00
Order before 3pm for same-day dispatch via Australia Post. 2-5 business days to most of Australia. Shipping rates and policy
Free shipping on orders over $120 (excluding 3D printers)
The Bambu Lab TH Board (Toolhead Board) is the primary circuit board controlling all filament extrusion functions on the P2S printer. This essential component manages hotend heating, extruder motor control, filament feeding, retraction, and temperature regulation — the core operations that make precise 3D printing possible. If you're experiencing extrusion errors, temperature irregularities, or toolhead communication failures that Bambu Lab support has traced to the TH board, this official replacement restores full functionality.
Key Features
- Controls all toolhead extrusion functions — feeding, retraction, temperature adjustment
- Manages hotend heating assembly, cooling fan, and eddy-current sensor connections
- Connects to MC board via toolhead cable for printer communication
- Official Bambu Lab OEM replacement part
- Includes all necessary mounting hardware
Specifications
- Material: Circuit board (metal, ceramics)
- Colour: Black
- Mounting: 4× BT2x5 screws
- Connections: TH board FPC cable (to extrusion interface board), toolhead cable (to MC board), hotend heating assembly, hotend cooling fan, eddy-current coil, extrusion motor cable
- Tools Required: H1.5 Allen key
Compatibility
- Bambu Lab P2S
What's in the Box
- TH Board ×1
- BT2x5 Screws ×4
- Adhesive Tape ×1
- Foam ×1
Related Toolhead Electronics
The P2S toolhead electronics consist of three interconnected components. Depending on your issue, you may need to replace one or more:
- TH Board: Main circuit board controlling extrusion functions (this part)
- Extrusion Interface Board: Connects the extruder motor and part cooling fan
- TH Board FPC Cable: Flexible cable connecting the TH board to the extrusion interface board
When to Replace the TH Board
- Visible damage to components, connectors, or cables on the circuit board
- Extrusion failures not resolved by cleaning or mechanical adjustments
- Temperature control errors or hotend heating issues
- Communication errors between toolhead and main control board
- Bambu Lab technical support has confirmed the TH board needs replacement
Installation Overview
Replacing the TH board requires removing the toolhead housing to access the circuit board. Before beginning, power off and disconnect the printer. Key steps include:
- Remove the toolhead rear housing cover
- Open connectors for the TH board FPC cable and extrusion motor cable
- Remove foam and tape from the existing TH board
- Disconnect hotend heating assembly, hotend cooling fan, and eddy-current coil
- Remove four BT2x5 screws with H1.5 Allen key
- Disconnect toolhead cable and remove the TH board
- Install new TH board in reverse order
- Run device calibration to confirm successful replacement
Full step-by-step instructions with images are available on the Bambu Lab Wiki.
Ideal For
- Replacing a faulty or damaged TH board
- Resolving persistent extrusion or temperature control errors
- Restoring toolhead functionality after electronic failure
- Spare parts inventory for P2S printers
Important Safety Notes
- Always power off and disconnect the printer before any maintenance
- When disconnecting fan and eddy-current coil cables, pull perpendicular to the connector — do not shake or apply sideways force
- Handle FPC cables with care to avoid damage
- The nozzle may be extremely hot — never touch with exposed skin
The TH Board is the brain of the P2S toolhead. When extrusion, heating, or sensor functions fail despite mechanical troubleshooting, the circuit board is often the culprit. This official Bambu Lab replacement ensures your P2S returns to reliable, precise printing.
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