How to Fix BROTHER Error Code A3

The Error Code A3 on BROTHER printers indicates: Document feeder (ADF) sensor failure.

Step 1: Perform a Hard Reset

Before disassembling any hardware, force the printer to clear its volatile memory.

1. Turn the printer on.
2. Disconnect the power cord from the rear.
3. Wait 60 seconds.
4. Reconnect and power on.

Step 2: Inspect Hardware Components

1. Open the access door.
2. Verify all components are seated securely.
3. Check for any jammed paper or foreign objects in the carriage path.

Step 3: Specific Component Verification

For Error Code A3, the issue is localized.

• Carefully inspect the electrical contacts and clean them with a lint-free cloth lightly dampened with distilled water.
• If the component has permanently failed, consider a replacement part.