Zebra
Troubleshooting guide
Zebra ZT230 troubleshooting guide: errors, faults and fixes
Phone support, repair and express exchange by TIMCOD technicians. The request form is in French.
In brief. The Zebra ZT230 is an industrial thermal transfer or direct thermal label printer. The causes most often cited by Zebra are simple: incorrectly loaded ribbon or media, an incorrectly positioned sensor, a printer not calibrated after a change of consumables, or a darkness setting that is too high. This guide sets out, message by message, the cause and the resolution steps described in the Zebra user guide. Click a question to open its entry.
- A message is displayed (Ribbon Out, Media Out, Head Open…): find it in the lookup table and open the matching entry.
- No message, but the print is poor (skipped or shifted labels, wrinkled ribbon, faded print): see the calibration, ribbon and labels and print quality sections.
- The problem keeps coming back: the preventive maintenance section explains how it reduces this type of fault.
Product pages on timcod.fr (in French): Zebra ZT230 · Zebra ZT200 Series
Examples:
Which error is my Zebra ZT230 showing? Lookup by message and by lights
The ZT230 reports its errors with a message on its LCD display and with the STATUS, PAUSE, DATA and SUPPLIES lights on the control panel. The table links each message to its cause and to the entry that resolves it.
| Message displayed | Lights (Zebra guide) | Likely cause | Entry |
|---|---|---|---|
Head Open – Close Head | STATUS solid red, PAUSE solid yellow | Printhead not closed or faulty head open sensor | Head Open |
Media Out | STATUS and SUPPLIES red | Media missing or incorrectly loaded, media sensor misaligned | Media Out |
Ribbon Out | — | Ribbon not detected, printer not calibrated for this ribbon, or thermal transfer mode without a ribbon | Ribbon Out |
Warning: Ribbon In | STATUS yellow, SUPPLIES flashing yellow | Ribbon loaded while the printer is in direct thermal mode | Ribbon In |
Printhead Overtemp – Printing Halted | STATUS solid yellow | Printhead overheating | Overtemp |
Head Cold – Printing Halted | STATUS flashing yellow | Printhead too cold, printhead cable incorrectly connected or faulty thermistor | Head Cold |
Thermistor Fault | STATUS yellow, scrolling messages | Printhead data cable incorrectly connected or faulty thermistor | Thermistor Fault |
Out of Memory | — | Not enough memory for the requested function | Out of Memory |
Cut Error | — | Cutter blade in the media path (cutter option) | Cut Error |
Not Authenticated – Replace Printhead | STATUS, PAUSE and DATA solid red | Installed printhead not recognised as a genuine Zebra printhead | Not Authenticated |
The lights come from the “Error Message Lookup” page of the Zebra ZT200 Series guide, common to the ZT210, ZT220 and ZT230. A dash means that the page consulted does not specify the state of the lights. The ZT230 has an LCD display with buttons, not a touch screen.
Zebra ZT230 error messages: causes and solutions
Ten error messages are documented by the Zebra guide. For each one: the short answer, the cause, the steps to follow and, where the guide provides for it, the point at which you need to hand over to a technician.
Why does my Zebra ZT230 show “HEAD OPEN” when the printhead is closed?
Message: Head Open – Close Head · Lights: STATUS solid red, PAUSE solid yellow.
Short answer: The printhead is not fully closed, or the head open sensor is no longer working properly. Close the printhead fully; if the message persists while the printhead is closed, the Zebra guide says to call a technician to replace the sensor.
Likely cause
Zebra gives two causes: a printhead that is not fully closed, or a head open sensor that is not working properly.
What to do
- Open the printhead lever fully, then close it until it locks.
- If the message persists while the printhead is properly closed, the head open sensor is at fault.
When to call a technician: if the error persists with the printhead closed, Zebra says to call a technician to replace the head open sensor.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 show “MEDIA OUT” when labels are loaded?
Message: Media Out (often searched for as “Paper Out”) · Lights: STATUS and SUPPLIES red.
Short answer: The media is not loaded or is loaded incorrectly, or the media sensor is misaligned. Reload the media, check the position of the media sensor, then calibrate the printer.
Likely cause
Zebra cites media that is not loaded or is loaded incorrectly, and a misaligned media sensor: the printer then does not detect the labels in place.
What to do
- Reload the media correctly.
- Check the position of the media sensor.
- Calibrate the printer (see the calibration procedure).
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 show “RIBBON OUT” when the ribbon is installed?
Message: Ribbon Out
Short answer: In thermal transfer mode, the printer has not detected the ribbon, or it has not been calibrated for the label and ribbon being used. Reload the ribbon and calibrate; if the ribbon is still not detected, print a sensor profile and adjust the “ribbon out” threshold. If your labels are direct thermal, switch the printer to Direct Thermal mode.
Likely cause
According to Zebra, the ribbon is not detected even though it is correctly loaded, or “the printer has not been calibrated for the label and ribbon being used”. With direct thermal media, a printer set to thermal transfer expects a ribbon.
What to do
- Check the print mode: set Direct Thermal if your labels are heat-sensitive (no ribbon).
- In thermal transfer, reload the ribbon correctly, then calibrate the printer.
- If the ribbon is loaded but still not detected: print a sensor profile and adjust the “ribbon out” threshold.
Sources: Error Message Lookup (opens in a new window) · Ribbon Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
What does “WARNING RIBBON IN” mean on a Zebra ZT230 and how do I clear it?
Message: Warning: Ribbon In · Lights: STATUS yellow, SUPPLIES flashing yellow.
Short answer: A ribbon is loaded while the printer is set to direct thermal mode. Remove the ribbon if your labels are heat-sensitive, or switch the printer to Thermal Transfer mode if they require a ribbon.
Likely cause
The Zebra guide states that the ribbon is loaded but the printer is set for direct thermal, a mode that does not use a ribbon.
What to do
- Identify your labels: direct thermal (no ribbon) or thermal transfer (with ribbon).
- Labels for direct thermal: remove the ribbon. Labels for thermal transfer: set the printer to Thermal Transfer mode.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 stop with “PRINTHEAD OVERTEMP” (printhead too hot)?
Message: Printhead Overtemp – Printing Halted · Light: STATUS solid yellow.
Short answer: The printhead is overheating. Let it cool down: printing resumes automatically. If the problem recurs, Zebra advises moving the printer or reducing the print speed.
Likely cause
The printhead has exceeded its operating temperature (Zebra guide).
What to do
- Let the printer cool down; printing resumes by itself.
- If the message comes back, move the printer or reduce the print speed.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 show “HEAD COLD” and stop printing?
Message: Head Cold – Printing Halted · Light: STATUS flashing yellow.
Short answer: The printhead temperature is approaching its lower operating limit: continue printing or move the printer to a warmer place. The message can also come from an incorrectly connected printhead data cable or a faulty thermistor; Zebra then says to call a technician.
Likely cause
Zebra cites a printhead that is too cold, but also an incorrectly connected printhead data cable or a faulty printhead thermistor.
What to do
- Continue printing.
- If the alert persists, move the printer to a warmer place.
- If the alert still persists, the cause is the printhead cable or the thermistor: see the Thermistor Fault entry.
When to call a technician: to reconnect the printhead cable correctly or replace the printhead (faulty thermistor), Zebra says to call a technician.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
How do I fix the “THERMISTOR FAULT” error on a Zebra ZT230?
Message: Thermistor Fault · Lights: STATUS yellow, messages scrolling on the display.
Short answer: The printhead data cable is incorrectly connected, or the printhead thermistor is faulty. In both cases, Zebra recommends calling in a technician to reconnect the printhead correctly or replace it.
Likely cause
Two causes documented by Zebra: an incorrectly connected printhead data cable, or a faulty printhead thermistor.
What to do
- The Zebra guide does not describe any action you can carry out yourself for this message.
- Have a technician reconnect the printhead cable or replace the printhead.
When to call a technician: Zebra says to call a technician to reconnect the printhead cable or replace the printhead.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 show “OUT OF MEMORY”?
Message: Out of Memory, while storing a graphic or a format.
Short answer: The printer does not have enough memory for the requested function. Adjust the label format or the print width, and check that the data is directed to an installed device.
Likely cause
There is not enough memory to carry out the requested function (Zebra guide).
What to do
- Adjust the label format or the print width.
- Check that the data sent is directed to an installed device.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
How do I fix the “CUT ERROR” on a Zebra ZT230 fitted with a cutter?
Message: Cut Error (cutter option)
Short answer: The cutter blade is in the media path. Switch off and unplug the printer, then inspect and clean the cutter module, without touching the blade with your fingers.
Likely cause
The cutter blade is in the media path (Zebra guide).
Caution: The Zebra guide warns: “The cutter blade is sharp. Do not touch or rub the blade with your fingers.”
What to do
- Switch off the printer and unplug it.
- Inspect the cutter module and clean it if necessary.
No Zebra page consulted deals with a peeler (peel-off) problem specific to the ZT230.
Sources: Error Message Lookup (opens in a new window) · Final Steps for Cutter Mode (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 show “NOT AUTHENTICATED – REPLACE PRINTHEAD” after a printhead change?
Message: Not Authenticated – Replace Printhead · Lights: STATUS, PAUSE and DATA solid red.
Short answer: The installed printhead is not recognised as a genuine Zebra printhead. Install a genuine Zebra printhead.
Likely cause
The printhead has been replaced with a printhead that is not a genuine Zebra printhead (Zebra guide).
What to do
- Install a genuine Zebra printhead.
Source: Error Message Lookup (opens in a new window) – Zebra ZT200 Series guide (official documentation).
A dirty sensor, a worn printhead or a damaged platen roller can be spotted before it fails during a preventive maintenance visit.
Explore TIMCOD preventive maintenanceCalibration problems: my Zebra ZT230 is skipping labels or not detecting them
Zebra recommends calibrating the sensors after any change in media or ribbon size or type, and whenever the printer skips labels or the image drifts.
Why is my Zebra ZT230 skipping labels and how do I calibrate it?
Symptoms: skipped labels, image drifting, blank labels before or after printing, non-continuous labels treated as continuous media.
Short answer: The printer is no longer calibrated for the media and ribbon installed. Run the manual sensor calibration: hold PAUSE + CANCEL for 2 seconds (or, on the ZT230, the TOOLS > SENSORS > START menu), then follow the procedure below.
Likely cause
Zebra recommends calibration after a change in ribbon or media size or type, or whenever the printer skips labels, the printed image drifts, or non-continuous labels are treated as continuous.
Official manual calibration procedure
- Hold PAUSE + CANCEL for 2 seconds, or go to the SENSORS menu (under TOOLS) and select START.
- Open the printhead and pull out about 20 cm (8 in) of media; leave only the liner, with no label, between the sensors.
- Remove the ribbon, close the printhead and press PAUSE.
- Wait for the SUPPLIES light to stop flashing.
- Put a label back under the sensors and reload the ribbon, close the printhead, then press PAUSE.
- Press FEED: a single label should advance each time you press it.
Clean the sensor and the platen roller if necessary.
Sources: Calibrating the Ribbon and Media Sensors (opens in a new window) · Performing Manual Sensor Calibration (opens in a new window) – Zebra ZT200 Series guide (official documentation).
How do I print a sensor profile on a Zebra ZT230 to diagnose label detection?
Use it when the printer has trouble detecting the gaps between labels, mistakes pre-printed areas for gaps, or does not detect the ribbon.
Short answer: The sensor profile is the diagnostic printout that Zebra indicates for three problems: gaps between labels poorly detected, pre-printed areas taken for gaps, ribbon not detected. On the ZT230, print it from the SENSORS menu by selecting PRINT, or send the ZPL command ~JG.
Likely cause
Zebra provides the sensor profile for when the printer has trouble detecting the gaps between labels, wrongly identifies pre-printed areas as gaps, or does not detect the ribbon.
Three documented methods
- At power-up, hold the button combination given in the guide until the first light goes out.
- Or send the ZPL command
~JGto the printer. - Or, on the ZT230 only, go to the SENSORS menu and select PRINT.
If the ribbon is not detected, then adjust the “ribbon out” threshold (see the Ribbon Out entry).
Source: Sensor Profile (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Ribbon and label feed problems on the Zebra ZT230
Ribbon wrinkling, breaking or not advancing, labels drifting: the causes documented by Zebra are loading, ribbon tension, darkness, printhead pressure and the media guide setting.
Why is the ribbon wrinkling on my Zebra ZT230?
Symptom: creases visible on the printout.
Short answer: According to the Zebra guide, there are three causes: incorrectly loaded ribbon, incorrect burn temperature (darkness), or incorrect or uneven printhead pressure. Reload the ribbon, set the darkness to the lowest level that gives good quality, and set the printhead pressure to the minimum needed.
What to do
- Reload the ribbon correctly.
- Set the darkness to the lowest level that gives good print quality; consider a FEED self-test.
- Set the printhead pressure to the minimum needed for good printing (uneven pressure is also a cause).
Source: Ribbon Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does the ribbon on my Zebra ZT230 break or melt during printing?
Short answer: The darkness setting is too high, or the ribbon is coated on the wrong side and cannot be used on this printer. Reduce the darkness, clean the printhead thoroughly, and check which side the ribbon is coated on.
What to do
- Reduce the darkness setting and clean the printhead thoroughly.
- Check that the ribbon is coated on the correct side; if not, replace it with a correctly coated ribbon.
Source: Ribbon Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does the ribbon on my Zebra ZT230 slip or not advance?
Short answer: The ribbon tension is set incorrectly. Adjust the tension on the ribbon spindles. If the printer does not detect the end of the ribbon, check the loading and calibrate.
What to do
- Adjust the ribbon tension on the spindles.
- If the end of the ribbon is not detected, check the ribbon loading and calibrate the printer.
Source: Ribbon Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why do the labels on my Zebra ZT230 drift sideways or jam?
Symptoms: labels that “walk” from left to right, wrinkle, jam or feed irregularly.
Short answer: The media is misaligned, or a printer component is incorrectly installed. Adjust the media guide; if that is not enough, Zebra refers you to a technician.
What to do
- Adjust the media guide against the edge of the labels.
- If the labels still drift, a component is incorrectly installed.
When to call a technician: if adjusting the media guide is not enough, Zebra says to contact a technician.
Source: Ribbon Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Several of these faults involve the ribbon or labels used. TIMCOD, Zebra reseller, supplies labels, thermal transfer ribbons and printheads for thermal printers (pages in French).
Print quality problems on the Zebra ZT230
Faded print or unreadable barcodes: the Zebra guide describes cleaning the printhead and the platen roller.
Why is my Zebra ZT230 printing faded or with unreadable barcodes?
Symptoms: faded, grainy or uneven print, barcodes that will not scan.
Short answer: Start by cleaning the printhead and the platen roller using the Zebra procedure: a swab from the maintenance kit or a swab moistened with 99.7% isopropyl alcohol, wiped along the brown strip of the printhead from end to end, then over the platen roller.
Official printhead and platen roller cleaning procedure
- Let the printhead cool down (risk of burns) and remove jewellery and metal objects.
- Use a swab from the Zebra maintenance kit, or a clean swab moistened with 99.7% isopropyl alcohol.
- Wipe the brown strip of the printhead from end to end.
- Clean the platen roller while rotating it.
Frequency: the Zebra guide refers to its cleaning frequency table. Cleaning kits and consumables are available from TIMCOD (see See also).
Source: Cleaning the Printhead and Platen Roller (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Cleaning the printhead, platen roller and sensors is part of TIMCOD preventive maintenance visits. Between visits, TIMCOD also supplies printer cleaning kits.
Schedule preventive maintenanceConnection problems: my Zebra ZT230 does not respond when I send a label
The DATA light is your first clue: if it does not flash, the communication settings are at fault; if it flashes without printing, the printer is receiving data that it does not recognise.
Why does my Zebra ZT230 not respond when I send a label?
Symptom: the format is sent but nothing happens (the DATA light does not flash), or DATA flashes without printing.
Short answer: If the DATA light does not flash, the communication settings are incorrect (driver, serial port, cable, handshake). If DATA flashes without printing, the printer's prefix and delimiter characters do not match those of the format, or the data sent is incorrect.
What to do
- DATA does not flash: check the communication settings of the driver or software, the serial port configuration, the use of a suitable null modem cable and the handshake protocol.
- DATA flashes without printing: check the prefix and delimiter characters set in the printer and the content of the format sent.
No Zebra page consulted documents a Wi-Fi or Bluetooth problem specific to the ZT230.
Source: Communications Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
Why does my Zebra ZT230 on a serial connection print a few labels and then distort the image?
Symptom: after a few correct labels, the printer skips, shifts or distorts the image (serial connection only).
Short answer: The serial communication settings are incorrect. Flow control must be identical on the host and on the printer, and the cable length must comply with the specifications.
What to do
- Check that flow control is set the same way on the host and on the printer.
- Check the length of the serial cable against the specifications.
- Review the communication configuration of the driver or software.
Source: Communications Problems (opens in a new window) – Zebra ZT200 Series guide (official documentation).
When should you call a technician for a Zebra ZT230?
The entries above first suggest reloading, cleaning or calibrating. In the following cases, the Zebra guide refers you to a technician:
- Persistent “Head Open”, printhead closed: head open sensor to be replaced.
- Persistent “Head Cold”: printhead cable to be reconnected or printhead to be replaced (thermistor).
- “Thermistor Fault”: printhead cable to be reconnected or printhead to be replaced.
- Labels drifting despite adjusting the media guide: component incorrectly installed.
Is your Zebra ZT230 in one of these situations? TIMCOD corrective maintenance includes phone support (hotline), repair to working order, express exchange and, as an option, SWAP. The repair request form is in French.
Request a repair Contact TIMCODAvoiding recurring faults on the Zebra ZT230: preventive maintenance
Several entries in this guide point to sensors that are badly positioned or dirty, a printhead or platen roller that needs cleaning, or unsuitable settings or consumables. These are exactly the points a preventive maintenance visit checks before they cause a breakdown.
TIMCOD preventive maintenance is part of the through-life maintenance (MCO) TIMCOD provides for your fleet (page in French): scheduled preventive visits by certified technicians, with a detailed report. What it brings to a ZT230 fleet:
- Fewer breakdowns, less downtimeFewer production interruptions caused by label printers.
- Worn parts detected in timePrinthead, platen roller, sensors: spotted before they cause a breakdown.
- Regular cleaning and checksPrinthead, rollers and sensors cleaned and checked at every visit.
- Longer service lifeA well-maintained, properly adjusted printer lasts longer.
- Print quality maintainedLegible barcodes, with darkness and printhead pressure suited to your consumables.
- Fewer emergency call-outsIncidents are handled during scheduled visits rather than as emergency repairs.
- Controlled maintenance costsA predictable budget instead of unplanned repairs.
- Specialist Zebra techniciansSupport from teams who know your equipment.
In addition, TIMCOD corrective maintenance includes phone support (hotline), repair to working order, express exchange and, as an option, SWAP. Maintenance contracts come in three levels (Essentiel, Confort, Premium).
Zebra ZT230 troubleshooting: frequently asked questions
How do I calibrate a Zebra ZT230?
Hold PAUSE + CANCEL for 2 seconds (or, on the ZT230, the TOOLS > SENSORS > START menu), then follow the manual calibration procedure in the Zebra guide: open the printhead, leave only the liner between the sensors, remove the ribbon, close, PAUSE; wait for the SUPPLIES light to stop flashing, put a label and the ribbon back, close, PAUSE then FEED. A single label should advance each time you press FEED. See the detailed entry.
When should I recalibrate a Zebra ZT230?
Zebra recommends calibration after a change in ribbon or media size or type, and whenever the printer skips labels, the printed image drifts, or non-continuous labels are treated as continuous. See the detailed entry.
Why does my Zebra ZT230 show RIBBON OUT when the ribbon is installed?
According to Zebra, the printer is not detecting the ribbon or has not been calibrated for the label and ribbon being used: reload the ribbon correctly, calibrate, then print a sensor profile and adjust the “ribbon out” threshold if necessary. If your labels are direct thermal, switch the printer to Direct Thermal mode. See the detailed entry.
What does WARNING RIBBON IN mean on a Zebra ZT230?
According to the Zebra guide, a ribbon is loaded while the printer is set to direct thermal mode. Remove the ribbon if your labels are direct thermal, or set the printer to Thermal Transfer mode if they require a ribbon. See the detailed entry.
How do I clean the printhead on a Zebra ZT230?
Let the printhead cool down, remove jewellery and metal objects, then wipe the brown strip of the printhead from end to end with a swab from the Zebra maintenance kit or a swab moistened with 99.7% isopropyl alcohol. Also clean the platen roller while rotating it. See the detailed entry.
How do I print a sensor profile on a Zebra ZT230?
Three methods according to Zebra: at power-up, by holding the button combination given in the guide until the first light goes out; by sending the ZPL command ~JG; or, on the ZT230 only, from the SENSORS menu by selecting PRINT. See the detailed entry.
Does the Zebra ZT230 have a touch screen?
No. According to the Zebra guide, the ZT230 has an LCD display and buttons (PAUSE, FEED, CANCEL and selection buttons). The touch screen procedures found online do not apply to it.
What should I do if my Zebra ZT230 rejects the printhead after a replacement?
The message “Not Authenticated – Replace Printhead” means that the installed printhead is not recognised as a genuine Zebra printhead. Zebra says to install a genuine Zebra printhead. See the detailed entry.
Sources consulted
All the causes, procedures and messages in this guide come from the pages below of the Zebra ZT200 Series user guide, consulted on 24 September 2026. These pages are common to the ZT210, ZT220 and ZT230.
- Error Message Lookup (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Ribbon Problems (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Communications Problems (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Calibrating the Ribbon and Media Sensors (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Performing Manual Sensor Calibration (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Sensor Profile (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Cleaning the Printhead and Platen Roller (opens in a new window) – ZT200 Series Industrial Printer User Guide official
- Final Steps for Cutter Mode (opens in a new window) – ZT200 Series Industrial Printer User Guide official
The following Zebra pages were not consulted for this guide: the article “Resolving ZT200 Series Ribbon Out Error”, the “Printing Issues” page of the ZT200 Series guide and the article “ZT Series Printer Fails to Power up or Perform Self-Test”. They are not cited. If the fault falls under these documents, refer to the manufacturer's documentation or ask the TIMCOD technicians.
Does your Zebra ZT230 keep running into problems?
Contact TIMCOD to set up preventive maintenance for your printer fleet: scheduled visits by certified technicians to check, clean and adjust your printers and spot worn parts before they fail.
Explore TIMCOD maintenance Request a quote