Troubleshooting and other information 
63
A
Turning off the machine will erase the fax data in the memory. To prevent you from losing any 
important messages, see Transferring your faxes or Fax Journal report (MFC-1810, 
MFC-1811 and MFC-1815) on page 74.
 
Self-Diagnostic The temperature of the fuser 
unit does not rise to a specified 
temperature within the 
specified time.
Turn the machine off, wait a few seconds, and 
then turn it on again. Leave the machine idle for 
15 minutes with the power on.
The fuser unit is too hot.
Toner Low If the LCD shows Toner Low 
you can still print; however, the 
machine is telling you that the 
toner cartridge is near the end 
of its life.
Order a new toner cartridge now so a 
replacement toner cartridge will be available 
when the LCD shows Replace Toner or 
Toner Ended.
Error Message Cause Action