K1 series/V3 series/Nebula screen/K2 Plus
This error is triggered when the nozzle thermistor (thermal sensor) is open-circuited.
Possible causes include:
Wiring issues with the hotend thermistor, check the thermistor wiring to ensure proper connection
Internal damage to the hotend thermistor, may require replacement of the thermistor or hotend assembly
Thermistor wiring issue: Check the thermistor wiring to ensure there are no loose or damaged connections. If wiring issues are found, reconnect and confirm a stable connection.
Thermistor damage: If the thermistor wiring is normal but the screen reading is negative, replace the thermistor or hot end
Check the thermistor wiring to ensure there are no loose or damaged connections.
If the thermistor wiring is normal but the screen reading is negative, replace the thermistor or hotend.