¶ Fault Description
The nozzle temperature control system mainly consists of a heater and an NTC thermistor. The TH board monitors the heater’s output power and the temperature reported by the NTC sensor. If the heater runs at full power but fails to reach the target temperature within the set time, a heater over-temperature alarm will be triggered.
Possible Causes：
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NTC connector or wiring has an short circuit
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TH board is broken
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NTC is faulty
¶ Troubleshooting
¶ Tools, Equipment, and Materials
- H1.5 hex screwdriver
- Multimeter
¶ Troubleshooting Steps
Users can adjust the order of steps based on their situation.
¶ Step 1: Check whether the silicone sock for hotend is intact and installed correctly
Refer to the guide: Replace H2S Silicone Sock for Hotend and Hotend
¶ Step 2: Check if the hotend heater assembly connector is loose or the cables are damaged
Refer to the guide: Replace H2S Hotend Heating Assembly to inspect the heater assembly connectors and cables.
If cables and connectors are intact, and you have a multimeter, you can further check the resistance of the hotend heater and NTC sensor.
If you have a multimeter, you can measure the resistance of the hotend components as follows to determine if the hotend is faulty. At room temperature:
- The ceramic heater resistance is approximately 7 Ω (measure between the two pins indicated by the red arrows in the image below)
- The NTC thermistor resistance is approximately 100 kΩ (measure between the two pins indicated by the orange arrows; note that NTC resistance varies slightly with temperature)
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If the measured resistance is abnormal, the hotend heater assembly may be faulty.
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If the measured resistance is normal, the TH board may be faulty.
If the above steps do not resolve your issue, please submit a ticket and upload your printer logs
¶ Conclusion
We hope this guide will provide you with useful information and help you solve problems.
To ensure that you operate safely and effectively, if you have any doubts or questions about any steps in the guide, please contact our Customer Support team before starting the operation.
We are always happy to answer your questions and provide support.
Click here to contact online technical support (service hours 9:00-21:00)
¶ Equivalent Codes
The following HMS codes represent the same type of issue.
| HMS Code | Description |
|---|---|
| 0300-0200-0001-0006 | The nozzle temperature is abnormal; the sensor may have a short circuit. Please check whether the connector is properly plugged in. |