Brother Printer Error Code A3: How to Fix It

Easy 5-10 minutes Low Severity Verified June 2026
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Error Code
A3
Brand
Brother
Product Type
printer
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
5-10 minutes
Brother printer error code A3 appears when you try to scan a document through the Automatic Document Feeder (ADF) that exceeds the maximum supported length. This error prevents scanning and requires you to use alternative scanning methods.
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Tools You'll Need

How to Fix Error Code A3

  1. Remove Document from ADF

  2. Use Scanner Glass Instead

  3. Adjust Scan Settings

  4. Scan Oversized Documents in Sections

  5. Clean ADF Sensors

    Ensure printer is powered off and unplugged before cleaning internal components

  6. Reset Printer Settings

Parts You May Need

Lint-free cleaning cloths
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Lint-free cleaning cloths
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Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
Lint-free cleaning cloths
Check Price on Amazon
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When to Call a Professional

Contact Brother support or a printer technician if the A3 error appears with normal-sized documents after cleaning and resetting, as this may indicate faulty ADF sensors or mechanical issues requiring professional repair.

Frequently Asked Questions

What is the maximum document length for Brother printer ADF?
Most Brother printers support documents up to 11.7 inches (297mm) in length through the ADF. Check your specific model's manual for exact specifications.
Can I scan long documents without getting error A3?
Yes, use the scanner glass instead of the ADF for documents exceeding the maximum length. You can also scan long documents in sections and combine them digitally.
Why does my Brother printer show A3 error with normal documents?
This usually indicates dirty or faulty ADF sensors. Clean the sensors with a damp lint-free cloth, or the ADF mechanism may need professional service.
How do I change from ADF to scanner glass on Brother printer?
In your scan software or printer control panel, look for scan source options and select 'Flatbed' or 'Scanner Glass' instead of 'ADF' or 'Document Feeder'.

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