This guide is intended for use if there is a problem with the Hotend Heating Assembly
Common issues that may indicate the need for replacement of the A1 mini Hotend Heating Assembly include:
- The Hotend Heating Assembly is wrapped in plastic due to a print failure
- The heater or thermistor is not working anymore
- The hotend metal latch is not working anymore
- Recommended by Bambu Lab Technical Support
Potential problems and solutions
If you encounter problems during the installation of a new Hotend Heating Assembly, please check the potential problems and solutions listed below:
The hotend temperature is 0
Check the Hotend Heating Assembly connector and confirm it is correctly inserted, as shown in Step 7. Re-connect all the cables
It is important to carefully align the connector pins to the Toolhead Board.
If the issue persists, the thermistor wires might have been damaged (white wires)
The hotend cannot be heated
Check the Hotend Heating Assembly connector and confirm it is correctly inserted, as shown in Step 7. Re-connect all the cables
It is important to carefully align the connector pins to the Toolhead Board.
If the issue persists, the heater wires might have been damaged (Translucent wires)
Printer is not homing correctly
Check the Eddy Sensor wires (5 and 6) and confirm they are correctly installed on the back of the Toolhead Board, as shown in Step 7. Re-connect all the cables
Filament sensor is not working anymore
Check the Ribbon Cable and confirm it is correctly installed on the back of the Toolhead Board, as shown in Step 5. Attach the Toolhead Board to the housing
If the ribbon cable is damaged, you will need to replace the Filament Sensor.
The first layer is inconsistent / Problems with first layer
Confirm that the Hotend Heater Assembly screws are tight, and bed leveling is enabled before starting the print
This Wiki article explains what to check and how to solve the problem