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Nozzle Heater Overcurrent

#26308 (MK4S) #13308 (MK4) #21308 (MK3.9)

Relevant for

MK4
MK3.9
MK4S
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What happened?

The Original Prusa MK4/MK3.9 shows the message: "Overcurrent detected on nozzle heater."

Error name: Nozzle Heater Overcurrent

Error code: #26308 (MK4S) #13308 (MK4) #21308 (MK3.9) #31308 (CORE One)

The error is shown when a damaged wire is on the hotend heater or any of its connections.

How to fix it? 

The most likely cause of this issue is damage to the hotend heater cable. Check the path between the hotend heater and the LoveBoard, and see if any parts are broken or pinched.

If there is no damage, check the cable connection to the LoveBoard board. Try reconnecting the cable to its connector.

In rare cases, this error message can be shown in case of damage to the LoveBoard or the xBuddy board. So if the cables and connectors are intact, check the boards for any visible damage.

Always touch the sides of the electronic board while manipulating it. Avoid touching the chips, capacitors, and other parts of the electronics.