Error 101 on the Elegoo Centauri Carbon and Centauri Carbon 2 Combo means the heated bed did not reach its target temperature during warm-up or mid-print. The printer detects that the bed is heating too slowly or not at all and halts to prevent a failed print or hardware damage.

What the Error Means

This error targets the bed heater subsystem specifically — not the thermistor (that is error 102). The firmware monitors how quickly the bed temperature rises after the heater is commanded on. If the rise rate falls below the expected threshold, error 101 fires. Common causes include a loose or damaged bed heater cable connector at the bed itself or at the motherboard, a failed heating element inside the bed, or a blown MOSFET on the motherboard that is responsible for switching bed power.

Step-by-Step Fix

1. Power off and unplug the printer before touching any wiring. The bed heater operates at mains or high-DC voltage levels.
2. Inspect the bed heater cable connector at the heated bed underside. Press it in firmly until it clicks or seats fully.
3. Inspect the opposite end of the same cable where it connects to the motherboard. Reseat that connector as well and look for any burn marks or heat discoloration around the pins.
4. Trace the heater cable along its full run — check for pinching under the bed, cuts from abrasion, or heat damage near the bed edge.
5. Measure heater resistance with a multimeter set to resistance (Ω). Disconnect the cable from the motherboard and probe the heater terminals. An open reading (OL / infinity) confirms a failed element; consult the Elegoo Centauri Carbon wiki for the expected resistance value.
6. If the heater element tests good, the fault may lie in the motherboard MOSFET. Contact Elegoo support for a motherboard or heated bed replacement — do not attempt MOSFET repairs on the mainboard yourself.
7. Reconnect everything, power on, and run a bed heat test from the touchscreen to confirm the error is cleared.

Parts Required

• Replacement heated bed heater element or complete bed assembly (if element is failed)
• Replacement motherboard (if MOSFET is damaged — supplied by Elegoo support)
• Multimeter (for resistance measurement)

If error 101 persists after reseating all connectors and confirming heater resistance, contact Elegoo support at the official wiki page for your model (Centauri Carbon or Centauri Carbon 2 Combo) to arrange a warranty assessment.

Frequently asked questions

What does Elegoo 101 mean?

Error 101 on the Elegoo Centauri Carbon and Centauri Carbon 2 Combo means the heated bed did not reach its target temperature during warm-up or mid-print. The printer detects that the bed is heating too slowly or not at all and halts to prevent a failed print or hardware damage.

How do I fix Elegoo 101?

Elegoo error 101 means the heated bed failed to reach target temperature. Learn how to diagnose and fix the bed heater cable, element, or MOSFET.