¶ 💡 Compatibility
This document applies to the following devices and software. Please note when referring to it:
Device model: U1
¶ 📝 Issue Description
The hotend cooling fan produces abnormal noise during operation, similar to a whistling sound.
¶ 🔎 Possible Causes
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Fan wiring interference causing the fan blades to collide.
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The fan is not securely mounted.
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Fan hardware failure.
¶ 🛠️ Troubleshooting Steps
¶ 1. Eliminate interference from other fans
Turn off the Part Cooling Fan and the auxiliary part cooling fan to confirm the source of the abnormal noise.
¶ 2. Check the fan noise
Heat the toolhead that produces the abnormal noise and observe whether the noise occurs when the fan starts rotating.
¶ 3. Manual fixing test
- Stop heating and use tape to secure the hotend cooling fan blades to prevent them from rotating.
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Start heating again and check whether the abnormal noise disappears.
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If the noise disappears, the issue is confirmed to be with the hotend cooling fan.
¶ 4. Check fan installation
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Remove the toolhead rear cover and check whether the fan blades are rubbing against wiring or whether the fan is securely fixed.
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If there is wiring interference, eliminate the interference; if the fan is not firmly fixed, try tightening the screws of the fan mount and the fan.
- Record troubleshooting results
If abnormal noise persists after inspection, please record the troubleshooting results and contact after-sales technical support.
¶ ✅ Solution
Based on the troubleshooting results, if the fan or fan mount is confirmed to be faulty, please contact after-sales support to replace the hotend cooling fan or the fan mount.
¶ 💬 Contact Support
After following the troubleshooting steps, if you find it difficult to resolve your issue, kindly submit a support ticket through https://snapmaker.formcrafts.com/u1-troubleshooting-request and share your troubleshooting results with some pictures/videos.
Our dedicated support team will be more than willing to assist you in resolving the issue.