MINTEMP ERROR
Creality 3D Printer
Severity: CriticalWhat Does This Error Mean?
MINTEMP ERROR means the printer is reading a temperature below the minimum threshold (usually below 0°C or room temperature). This almost always means the thermistor is disconnected, broken, or has a wiring fault. Check the thermistor connection.
Affected Models
- Creality Ender 3
- Creality Ender 3 V2
- Creality Ender 5
- Creality CR-10
- All Marlin-based printers
Common Causes
- Thermistor wire disconnected from the mainboard
- Thermistor wire broken (often from repeated hotend movement)
- Thermistor connector not fully seated on the mainboard
- Thermistor glass bead cracked
- Mainboard thermistor input damaged
How to Fix It
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Check the thermistor connector on the mainboard.
Open the electronics enclosure and check that the thermistor plug is firmly seated. A loose connector reads as disconnected (very low temperature).
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Inspect the thermistor wires for breaks.
Follow the thin wires from the hotend to the board. Bending and movement can break the wires, especially near the hotend.
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Test the thermistor with a multimeter.
At room temperature, a typical NTC 100K thermistor reads about 100,000 ohms. If it reads infinite (open circuit), the thermistor is broken.
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Replace the thermistor.
Thermistors cost $2-$5 and are easy to replace. Make sure you get the correct type for your printer (usually NTC 100K).
Frequently Asked Questions
Can MINTEMP appear if my room is very cold?
Normally no — the threshold is well below room temperature (typically 0°C or 5°C). Even a cold garage should not trigger MINTEMP unless the thermistor is faulty.
What thermistor type does the Ender 3 use?
The Ender 3 uses an NTC 100K thermistor (also called a Beta 3950). Replacement thermistors are very cheap and widely available.