Brother error code Comm.Error
Quick answer
Poor telephone line quality disrupted a fax transmission. Resend the fax or connect to a different telephone line.
Before you try the solution
- 1. Copy the complete message exactly as shown, including any letters, spaces, or punctuation around Comm.Error.
- 2. Find the printer's exact model number. The same-looking code can mean something different on another model family.
- 3. Let the current print, scan, or update operation stop before touching controls, paper paths, or covers.
Manufacturer-documented solution
Poor telephone line quality disrupted a fax transmission. Resend the fax or connect to a different telephone line.
Model scope: Brother's Error and Maintenance Messages for your exact model
If the error is still there
- 1Return to the screen or job that produced the message and check whether the code has cleared.
- 2If Comm.Error returns, do not repeat a risky procedure. Record when it appears and check the documentation for the exact model.
- 3If the documented action does not clear Comm.Error, contact Brother support or a qualified printer technician with the model number and complete message.
Other Brother error codes
- CondensationCondensation may have formed inside the machine after a room temperature change. Brother's remedy is to leave the machine switched on and wait 30 minutes with the top cover open.
- Connection Error 02Network connection failed while using Brother Web Connect because the machine lacks network connectivity or the connection hasn't stabilized after startup. Verify the network connection is good and try again.
- Connection Error 03Connection to the Brother Web Connect server failed, indicating incorrect network/server configuration or a server-side issue. Check network settings.
- Connection Error 07Connection to the Brother Web Connect server failed because the machine's date and time settings are wrong. Correct the machine's date/time and retry.
- Connection Error (wireless session overlap)During Wi-Fi Protected Setup/AOSS wireless configuration, the machine detected more than one access point/router advertising WPS or AOSS mode at once. Ensure only one router/access point has WPS or AOSS mode enabled, then restart the wireless setup.
- Cooling DownThe temperature inside the machine is too hot. It pauses until it has cooled; Brother says to check that all vents are clear.
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Manufacturer reference
The meaning and documented action above were taken from the manufacturer source below.
Error and maintenance messagesVerified against manufacturer documentation, last checked 2026-08-13. PrintDiag has no printers and no technician, so nothing here is claimed as tested on hardware.