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0300_0300
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Bambu Lab · FDM 3D Printers
Bed Heating Failed - Heated Bed Cannot Reach Target Temperature
Quick Answer
Error code 0300_0300 on your Bambu Lab FDM 3D Printers means: Bed Heating Failed - Heated Bed Cannot Reach Target Temperature. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
A1A1 MiniP1PP1SX1 CarbonX1E
Likely Causes
  1. Bed heater wiring has developed a high-resistance connection
  2. Ambient temperature too low for the bed heater capacity
  3. Bed heater power connector on the mainboard has a loose or burnt pin
  4. PEI plate or build surface adding thermal insulation on top of the bed
How to Fix It
1
Check the bed temperature curve in Bambu Studio to determine if it is rising slowly or not at all
2
Inspect the bed heater cable connection on the underside of the printer for any damage or loose connectors
3
Ensure the printer is not in an extremely cold environment (below 10C ambient)
4
For the A1/A1 Mini, check that the magnetic build plate is making full contact with the heated bed
5
If the bed heater connector shows signs of burning or melting, replace immediately
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 heated bed assembly (model specific)
Bed cable harness
Related Error Codes
0300_01000300_02000300_04000500_01000500_0200
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