Xerox Fault Code 043-343 May 2026

The thermistor is a temperature-sensing resistor that touches the fuser roller. If it becomes coated with toner, dust, or paper fibers, it sends inaccurate temperature readings to the control board. When the MCU detects a discrepancy between the expected temperature and the actual reading, it triggers code 043-343.

Once the error is resolved, adopt these best practices to avoid recurrence:

Open the right-side or front cover (depending on your model) to access the fuser area. Use a flashlight and forceps to remove:

Xerox Fault Code 043-343 is a safety mechanism designed to protect the Ink Melt System from overfill damage. While often resolved by simple user maintenance (replacing the waste ink container), it can indicate deeper mechanical obstructions or sensor failures within the IMS. Through systematic diagnosis—starting with the waste container, moving to sensor checks, and ending with IMS replacement—technicians can restore functionality efficiently. Xerox Fault Code 043-343

Disclaimer: This paper is for educational and technical reference purposes only. Always consult the official Xerox Service Manual for your specific device model (e.g., VersaLink C7000, AltaLink C8000) before attempting hardware repairs. Improper handling of the Ink Melt System can result in severe thermal burns.

Xerox Fault Code 043-343 is intimidating, but it is almost always a solvable hardware issue. In the vast majority of cases, the fix involves cleaning or replacing the fuser unit. Begin with a power cycle and visual inspection for jams. If the code persists, order a genuine replacement fuser specifically designed for your Xerox model.

If you are uncomfortable working inside the printer’s hot roller area or if the error returns after a fuser swap, engage a qualified Xerox service partner. Do not ignore the code – prompt action prevents secondary damage to drive motors and control boards. Disclaimer: This paper is for educational and technical

For official service documentation, refer to Xerox’s Product Support website and search for “043-343” within your specific model’s Service Manual (Section 3 – Error Codes).

Last updated: [Current Date] – Information applies to Xerox Color 550/560/570, Versant 80/180/2100, D95/D110/D125, and AltaLink series. Always confirm compatibility with your machine’s Service Manual.

Safety: automated actions limited to non-invasive operations; actions that require disassembly or replaceable parts prompt guided user or service request. Xerox Fault Code 043-343 is intimidating, but it

If you have service access (Hold 0 and Start while powering on to enter Diagnostic Mode), you can view additional sub-codes:

These granular codes help determine whether to replace the entire fuser assembly, a specific thermistor, or the drive assembly.

While replacing a user-replaceable fuser is straightforward, you should call a trained technician if: