Fuser Low Temp / U4-2 Error Message, Xerox Phaser 4500

 

Repair Aids for the  Fuser Low Temp / U4-2 Error Message, Xerox Phaser 4500  

The U4-2 Error Message – Fuser Low Temp – on these machines is related to the fusing temperature dropping 25 decrees Celsius from the operating temperature setting the machine is currently set for. In other words the operating temperature has dropped to appoint that the internal temperature cannot properly bond the toner to the paper so the machine has shut down to avoid unwanted print quality problems. Below is some troubleshooting tips and repair advice for this problem. I’ve also included some links to purchase a PM kit. Due to the price of the PM kit compared to buying parts like the fuser individually I feel it is in your best interest to just order in the whole kit and replace all the parts when a fusing assembly error is displayed on the control panel.

Phaser 4500 U4-2 Error Message

Phaser 4500 PM kit

Troubleshooting Aids for the U4-2 Error Message

1. Turn the machine off then back on.

2. Verify the power source. Make sure the printer is plugged directly into a wall outlet. NO power strips and Battery Backups or UPS’s.

3. Remove the fusing assembly and check the thermistors for toner build up on the surface. If enough toner debris gets build up on the surface between the thermistor sensor and the hot roller then the sensor will get an inaccurate reading which can lead to the U4-2 Error Message. The thermistors are item number 4 in the picture below.

Phaser 4500 fuser electrics

4. Check your media settings and verify they are correct with the media you are printing on.

5. Check the environment – Verify the machine is operating at temperatures that meet specifications. I typically don’t recommend temperatures under 60 decrees Fahrenheit.

Click on the link below for the Maintenance Kit replacement Instructions

Replace Maintenance Kit Message on the Xerox Phaser 4500 Printer

Click on the link below for additional details and buying options for the Phaser 4500 PM Kit – Rated at 200,000 Prints
XEROX 108R00600 maintenance kit (110V) for xerox phaser 4500

Xerox 108R00600 Phaser 4500 Maintenance Kit in Retail Packaging

Price: $189.62

1 used & new available from $189.62

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