Brother 8040 error 6e

For error code 6E:

This means the heater temperature isn't rising fast enough.
The heater should rise at 2°C every 5 seconds.

You should first reset the code to see if the problem is just an anomoly or a real problem with the heating circuit (the halogen lamp and/or the power supply PCB). If after resetting the code the error returns, have a technician or service center diagnose which is the culprit (or you could simply replace both yourself -- if that is affordable to you).

To reset the trouble status follows these steps:
1. Press MENU *,2,8,6,4
2. The machine beeps for approx. one second and displays “MAINTENANCE" on the LCD, indicating that it is placed in the initial stage of the maintenance mode, a mode in which the machine is ready to accept entry from the key pad.
3. Now you are inside the simulation Press 01 to reset the trouble status.
4. To exit the simulation press 99.

• Pressing the 9 key twice in the initial stage of the maintenance mode makes the machine exit from the maintenance mode, restoring it to the standby state.
• Pressing the Stop button after entering only one digit restores the machine to the initial stage of the maintenance mode.

I hope this helps.