Franking Machine Says Ink Cartridge Not Recognised? 5 Fixes to Try
If your franking machine says the ink cartridge is not recognised, the cause is almost always simple: the wrong cartridge for the model, leftover protective tape, a cartridge that is not fully seated, or dirty contacts. Work through those four checks in order and most machines will accept the cartridge within a few minutes, with no engineer visit needed.
Why does a franking machine reject an ink cartridge?
Franking machines rely on the cartridge and printhead communicating properly. The machine needs to detect the cartridge, confirm it is the right type, and then allow ink to flow to the printhead. If any part of that chain fails, you will see a message such as "ink cartridge not recognised", "check cartridge" or "replace ink".
The good news is that the fault usually lies with the physical fit or preparation of the cartridge, not the machine itself. It is worth ruling out the simple causes before assuming anything is broken.
Step 1: Check you have the right cartridge for your model
Franking cartridges are model specific. Two machines from the same manufacturer can look similar and still take different cartridges, so a near match will not work. Check the model name on the front or back of your machine and compare it with the cartridge listing.
Our guide on finding the right franking ink cartridge walks through this in detail. You can also browse ink by machine family, for example the Pitney Bowes Connect+ range, the Neopost IS330 and IS350 range or the FP Mailing Postbase range.
Step 2: Remove all protective tape and packaging
New cartridges often ship with tape or plastic covering the vent and ink holes. If it is left in place, ink cannot flow and the machine may flag the cartridge as faulty. Pitney Bowes states in its own guidance for the DM60 that the protective tape must be pulled off before installing, and the same principle applies to most franking cartridges.
Look over the cartridge in good light and check every face, including the underside, before you fit it.
Step 3: Reseat the cartridge properly
A cartridge that is slightly out of position is one of the most common causes. Follow this routine:
- Switch to the ink replacement menu on the machine if it has one.
- Open the cover and release the cartridge latch.
- Remove the cartridge and set it down on a clean, dry surface.
- Refit it, tilting it in if your model requires that, then bring it upright.
- Press the latch down until it locks, then close the cover.
Many machines run an initialisation routine after the cover closes, which can take a few minutes. Leave the machine alone during this period. If you would like a fuller walkthrough, see how to change franking machine ink without the mess.
Step 4: Clean the contacts and check for damage
Some cartridges carry electrical contacts or a chip that the machine reads. Fingerprints, ink smears or dust on these areas can interrupt the connection. Wipe the contacts very gently with a dry, lint-free cloth. Avoid liquids unless your machine's manual specifically says otherwise, and never touch the printhead nozzles.
Inspect the cartridge for cracks, leaks or bent contacts. A damaged cartridge should be replaced rather than forced into the machine.
Step 5: Consider the cartridge itself
If the same message appears with a correct, properly prepared and seated cartridge, the cartridge may be faulty, expired or badly stored. Ink that has been sitting for a long time or stored somewhere hot or cold can behave unpredictably. Our article on how long franking ink lasts covers storage and shelf life.
It is also worth trying a second cartridge if you have one. If a spare works, the first cartridge was the problem. If neither works, the machine is the more likely cause. If you are choosing between options, our comparison of original vs compatible franking ink explains the trade-offs.
When to stop troubleshooting
If you have checked the model, removed the tape, reseated the cartridge and cleaned the contacts, avoid repeated forced installs, as this can damage the latch or the printhead. Note the exact message displayed and your machine model, then get in touch. Our team can help you confirm you have the correct product, and you can reach us through our contact page.
How to avoid the problem next time
A little routine goes a long way. Keep spare cartridges in their original packaging until needed, store them upright in a stable environment, and always double check the model before ordering. Building ink checks into your regular franking machine maintenance checklist means small issues are spotted before they interrupt a busy post run.
Frequently asked questions
Why does my franking machine say the ink cartridge is not recognised?
The most common reasons are an incompatible cartridge, protective tape left on the new cartridge, a cartridge that is not fully seated, or dirty contacts. Check each of these in turn before assuming a fault.
Can I use a cartridge from a different franking machine model?
Not usually. Cartridges are designed for specific models, and a similar looking cartridge may not be accepted or may print poorly. Always match the cartridge to your exact machine model.
How long should I wait after fitting a new franking ink cartridge?
Many machines run an initialisation routine that takes a few minutes, so wait until the machine finishes before printing. Follow any prompts on the display, and run a test print to confirm the ink is flowing.
Is it safe to clean the contacts on a franking ink cartridge?
A gentle wipe with a dry, lint-free cloth is generally fine, but avoid liquids and never touch the printhead nozzles. If in doubt, check your machine's manual or ask us for advice.
What should I do if a new cartridge is still not recognised?
Try a second cartridge to see whether the first is faulty, then contact us with your machine model and the exact message shown. This helps us confirm you have the right product.
Need a replacement? Browse our full range of franking machine ink cartridges and labels, or find your machine's collection to get the right fit first time.