MINTEMP ERROR
Prusa 3D Printer
Severity: CriticalWhat Does This Error Mean?
MINTEMP means the printer reads a temperature below the minimum threshold. The thermistor is almost certainly disconnected or broken. Check the thermistor cable and connector on the mainboard.
Affected Models
- Prusa MK4
- Prusa MK3S+
- Prusa Mini+
- Prusa XL
Common Causes
- Thermistor cable disconnected from the board
- Thermistor wire broken from repeated movement
- Thermistor connector not fully seated
- Thermistor bead cracked
How to Fix It
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Check the thermistor connector on the Einsy/Buddy board.
Open the electronics box and make sure the thermistor plug is firmly seated.
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Inspect the thermistor wires for breaks.
Follow the wires from the hotend to the board. Look for damage, especially near the hotend where they flex.
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Replace the thermistor if damaged.
Prusa sells replacement thermistors. They are inexpensive and come with clear installation instructions.
Frequently Asked Questions
Where can I buy Prusa replacement parts?
Prusa sells all spare parts on their e-shop at prusa3d.com. Thermistors, heater cartridges, and cables are all available individually.
Is MINTEMP always a hardware problem?
Almost always, yes. It means the thermistor circuit is open — either the sensor or its wiring has broken.