121 errors
121 error messages
Error code Description Action
121.07 Fuser has been on for more than allowed after a gap
blowout, and the temperature is still too cold.
Go to
“Fuser service check” on page 87.
121.08 Fuser was under temp when page was in fuser.
121.20 Fuser undertemp during steady state control. Can
occur in printing or standby modes.
121.22 Fuser did not warm enough to start line voltage
detection.
121.23 Fuser took too long to heat to line detection temp.
121.24 Fuser never reached detection temperature.
121.25 After line voltage detection, control did not roll over
to steady state control in time.
121.26 Failed to reach temperature during warm up.
121.28 Failed to reach EP warm up temperature in time.
121.29 Fuser failed to reach pre‑heat temperature for motor
start during warm up.
121.30 Fuser failed to reach printing temperature by the time
a page reached the fuser.
Go to
“Fuser service check” on page 87.
121.31 Fuser is too hot. Global temperature check.
121.32 Open fuser main thermistor.
121.33 Open fuser edge thermistor.
121.34 Open fuser backup roll thermistor.
121.35 Attempting to POR after receiving a 121.34.
121.36 Fuser did not heat to allow compression jog.
121.37 Fuser heated faster than allowed during line voltage
detection.
Fuser service check
Action Yes No
Step 1
a Restore the engine settings to their defaults:
Diagnostics Menu > Printer Setup > Defaults
b Restore the EP setup settings to their defaults:
Diagnostics Menu > EP Setup > Defaults
Does the problem remain?
Go to step 2. The problem is solved.
4514
Diagnostic information
87
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