Question about Brother MFC-8440 All-In-One Laser Printer

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Error messge 78 model mfc-8440 - Brother MFC-8440 All-In-One Laser Printer

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  • el wend May 11, 2010

    the problem you found. error message 78 for brother mfc 8440.

    but, what i gotta do now?

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1 Answer

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  • Brother Master
  • 1,113 Answers

What have we been doing to this machine? Playing in fuser?

78=Heater thermistor harness disconnected or broken.

Posted on Nov 09, 2007

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Posted on Jan 02, 2017

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1 Answer

WHEN I TURN ON MY MACHINE BROTHER MFC 8440 I SEE ON THE SCREEN ERROR MACHINE 6A I NEED A SOLUTION


Error factor: Heater warming-up timeout error.
(Heater does not reach 60°C within 11 sec.)

Check: • Thermistor ASSY
• Halogen lamp

Jan 08, 2011 | Brother MFC-8440 All-In-One Laser Printer

2 Answers

Brother mfc 8440 error 78


This refers to a error with the fuser temperature you need it repaired by a service technician. Parts can be as little as $15 for the thermistor sensor or as much as $100 for a new fuser.

Jun 07, 2009 | Brother MFC-8440 All-In-One Laser Printer

1 Answer

Machine errore 6e brother 8440 mfc


You have a fault with either the Halogen lamp or the Power Supply PCB, basically the heater in the printer is not heating quick enough.

Mar 21, 2009 | Brother MFC8440 Remanufactured Laser...

1 Answer

Machine error 6F on a brother mfc-8440


first what is the message???? i will try and help you whenn you let me know the problem or the error message

Dec 10, 2008 | Brother MFC-8440 All-In-One Laser Printer

1 Answer

Brother mfc 8440


This is commonly a problem with the left hinge being broken on the lid where the adf is. Check that and if it is broken i can give you a part number.

Good luck!

Sep 03, 2008 | Brother MFC8440 Remanufactured Laser...

1 Answer

Error 6B


6B is a self diagnostic issue. it seems the power supply may have just bit the dust. 

Apr 09, 2008 | Brother MFC-8440 All-In-One Laser Printer

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