Prusa Error 13309: Input Port Overcurrent on the xBuddy Board
Prusa error 13309 is overcurrent on the xBuddy input port. Disconnect whatever you just plugged in, then work out which accessory is drawing too much.
Category: Error codes
Machine error codes explained: Bambu HMS codes, MINTEMP and MAXTEMP, thermal runaway, homing and probe failures. What the code means, and what to check first.
Prusa Error 13206: Print Head MAXTEMP, a Shorted Wire
Prusa error 13206 means the print head thermistor read above its maximum. Almost always a shorted wire at the head rather than a genuinely overheating nozzle.
Prusa Error 13207: Heatbed MINTEMP, an Open Circuit
Prusa error 13207 means the heatbed thermistor read below its minimum, which is an open circuit rather than a cold bed. Where the break usually turns out to be.
Prusa Error 13321: Power Panic Detected on Startup
Prusa error 13321 is a power panic fault detected at startup. What the power panic circuit does, why it matters, and the cable that is usually the culprit.
Prusa Error 13308: Nozzle Heater Overcurrent
Prusa error 13308 means overcurrent on the nozzle heater. It is an electrical fault, not a temperature one: a shorted cartridge or a chafed wire at the head.
Prusa Error 13301: Z Homing Failed, and the Loadcell
Prusa error 13301 is a Z homing failure, and on an MK4 it points at the loadcell rather than an endstop. What that sensor does and why it stops working.
Prusa Error 13305: Homing Error on the Y Axis
Prusa error 13305 is a homing failure on the Y axis, which on a bed-slinger means the bed itself. Obstructions, belt tension and rail cleanliness, in order.
Prusa Error 13304: Homing Error on the X Axis
Prusa error 13304 is a homing failure on the X axis. Something is blocking the carriage, the belt has gone slack, or a pulley grub screw has worked loose.
Prusa Error 31102: Precise Homing Failed on the CORE One
Prusa error 31102 is a precise homing failure on the CORE One. Continuing risks layer shifts, so this is worth fixing properly rather than dismissing.
Prusa Error 13109: Steel Sheet Not Detected
Prusa error 13109 means the printer cannot detect the steel sheet. It is a safety stop that prevents printing onto the bare heatbed. What to check, in order.