0900_0100
Easy Fix
Bambu Lab · FDM 3D Printers
WiFi Disconnected - Printer Lost Wireless Network Connection
Quick Answer
Error code 0900_0100 on your Bambu Lab FDM 3D Printers means: WiFi Disconnected - Printer Lost Wireless Network Connection. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Check the WiFi signal strength in the printer network settings on the touchscreen
2
Move the printer closer to the WiFi router or add a WiFi extender
3
Re-enter the WiFi credentials on the printer touchscreen: Settings > Network > WiFi
4
Restart both the printer and the WiFi router
5
Assign a static IP address to the printer in the router DHCP settings to prevent IP conflicts
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
WiFi range extender (if signal strength is the issue)
Ethernet cable and USB-to-Ethernet adapter (for wired connection as a workaround)
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