3-124 Phaser 6180MFP Multifunction Printer Service Manual
Error Messages and Codes
Printer Too Hot
The printer is too hot. The following troubleshooting procedure applies to this 
error.
Applicable Chain Link
■ Chain Link 042-700: Printer Too Hot (IOT Over Heat Stop)
■ Chain Link 142-700: Printer Too Hot (IOT Over Heat Forced Half Speed)
Initial Actions
■ Cycle printer power.
■ If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ Feeder Assembly, PL3.2.1
■ MCU Board, PL9.2.13
■ Humidity Harness, PL10.1.15
■ “Map 2 - Laser Unit and Feeder” on 
page 10-11
■ “Map 4 - LVPS and MCU Board” on 
page 10-13
■ “Xerographic” on page 10-34
Troubleshooting Procedure Table 
Step Actions and Questions Yes No
1 1.Check the room temperature.
2.Is the room temperature over 
32° C?
Adjust the room 
temperature to 
less than 32° C.
Go to step 2.
2 Did the user print large print jobs? Go to step 6. Go to step 3.
3 1.Check the MCU Board for correct 
installation. Reseat the MCU Board 
(page 8-88).
2.Does the error still occur when 
printing?
Go to step 4. Complete.
4 Check the Humidity Harness for 
continuity.
1.Disconnect P/J26 from the MCU 
Board.
2.Disconnect P/J261 from the 
Humidity/Temperature Sensor.
3.Check continuity between P/J26 <=> 
P/J261.
Go to step 5. Replace the 
Humidity 
Harness.