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0300_0200
Moderate
Bambu Lab · FDM 3D Printers
Hotend Temperature Not Stable - Temperature Fluctuation Exceeds Tolerance
Quick Answer
Error code 0300_0200 on your Bambu Lab FDM 3D Printers means: Hotend Temperature Not Stable - Temperature Fluctuation Exceeds Tolerance. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
A1A1 MiniP1PP1SX1 CarbonX1E
Likely Causes
  1. Part cooling fan directing excessive airflow onto the heat block
  2. Silicone sock has fallen off the hotend heat block
  3. PID or thermal control parameters need recalibration
  4. Printing in a cold environment without the enclosure fully closed
  5. Thermistor is partially detached from the heat block
How to Fix It
1
Check that the silicone sock is properly seated on the hotend
2
For enclosed models (X1C, X1E, P1S), ensure the enclosure door and top lid are closed
3
Monitor the temperature stability in Bambu Studio device panel during a test heat
4
If the issue persists, perform a factory reset of the thermal calibration from the touchscreen
5
Verify the thermistor is secured in the heat block and not loose
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Replacement silicone sock (Bambu Lab OEM)
Replacement thermistor assembly
Related Error Codes
0300_01000300_03000300_04000500_01000500_0200
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