Repair workspace

Part Cooling Fan Not Spinning or Weak

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Fast answer

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Check slicer fan commands, fan ducts, debris, connector, voltage, and fan direction before increasing cooling percentages.

Cooling & FansEasy12 min

Progress

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Step 1

Use the printer interface to test the fan at several percentages.

Step 2

Inspect and clean the blades and duct.

Step 3

Confirm the duct points below the nozzle without touching the print.

Step 4

Review first-layer and material fan settings in the slicer.

Step 5

Set a supported minimum fan speed if the fan stalls at low PWM.

Step 6

Inspect connector and cable during toolhead movement.

Step 7

Replace a noisy, cracked, or unreliable fan with a compatible part.

Step 8

Verify using a bridge or overhang test.

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