A tap that fails at the terminal has three different possible causes, and only one of them is the reader itself. Sorting out which one is happening first saves a part order that wouldn't have fixed anything.
My customer tapped and nothing happened, is the reader broken?
Not necessarily. Start by separating three failure types: the reader hardware isn't responding at all, the reader is working but the specific card or wallet is being declined upstream, or NFC was never enabled on the processor side even though the physical reader is installed. A completely dead reader usually shows no response to any card or phone, including ones that worked at that same terminal last week. A reader that works for some customers and not others is almost never a hardware problem.
Why does NFC work for some cards and phones but not others?
This is the most common version of the complaint, and it's usually not the ATM's fault. A physical contactless card taps the reader and sends the real card number straight through, which tends to work reliably. A phone wallet like Apple Pay or Google Pay sends a tokenized number instead, and many large card issuers block tokenized taps at non-bank ATMs specifically, even while allowing the same tap at a retail checkout. The reader hardware did its job in both cases. The decline happened at the issuer, not at your terminal. This is separate from whether the reader is worth having at all, which is covered in do you really need an NFC card reader on your ATM.
How do I tell a hardware failure from a processor block?
Test with a plain contactless debit or credit card first, not a phone wallet. A physical NFC card failing across every attempt points to the reader itself. A physical card working while phone wallets consistently fail points to issuer policy, not your hardware. Also check whether the failures started right after a service visit or cassette reload, since the reader cable can get disturbed during routine work and just needs reseating rather than replacing.
Could a software or firmware issue be causing this?
Yes, and it's worth ruling out before ordering a part. NFC has to be enabled in the ATM application itself, not just physically installed, and an update or reconfiguration can reset that setting or drop the certification your processor issued for contactless. Check current firmware and confirm NFC is still flagged as active in the terminal's configuration. ATM software downloads has the current builds if a reflash turns out to be the fix.
What's the checklist before I order a replacement reader?
Run these in order. Power down and reseat the ribbon cable between the reader and the main board, since a jarred connection from recent service is a common and free fix. Test with a physical contactless card, not a phone, to rule out issuer-side declines. Confirm NFC is still enabled in the terminal configuration after any recent software work. Check whether the failures are isolated to one card network, which points upstream, or affect everything, which points to the reader. If all of that checks out and the reader still shows no response to any card, the module itself needs replacement.
Which ATM models have an NFC upgrade path?
Genmega's Onyx, Onyx-W, and C6000 use one NFC upgrade kit at $389. The GT5000 and T4000 share their own kit, also $389, and the Nova has a separate kit at the same price. The G2500 splits by bezel revision: the new revision bezel kit runs $389, while the old revision bezel kit runs $620 because it includes additional bezel hardware. On the Hyosung side, the Halo 2 NFC kit covers that model line. Not every legacy model has a supported kit, so confirming the exact model before ordering matters more here than on most other parts.
Should I buy a reader only or the full upgrade kit?
If the ATM already has NFC installed and only the reader module failed, the Genmega NFC reader, reader only at $359 replaces just the failed part without the bezel and cabling that's already in place and working. A full upgrade kit is for machines adding NFC for the first time, or for a G2500 with the older bezel revision that needs the hardware change to accept the new reader at all.
My card reader isn't reading any cards, not just NFC taps?
That's a different and broader issue than an NFC-specific failure, and it points at the whole card reader module rather than just the contactless antenna. Chip and swipe failures alongside NFC failures usually mean the reader itself has failed at the module level, not just the contactless piece. The full troubleshooting checklist for that scenario, including when a reader is failing because it was never NFC capable in the first place, is in ATM card reader not reading cards.
How much does an NFC reader replacement cost, and can I install it myself?
Reader-only replacements run $359, and full upgrade kits run $389 to $620 depending on model and bezel revision. Most operators who handle routine card reader swaps can seat the module and cable themselves. The step that gets missed is confirming NFC certification with the processor after installation, since a physically correct install still won't accept contactless taps until the processor activates it on their end. Send-in service through the repair center is the option when the install stalls or the module needs diagnosis beyond a cable check.
My ATM never had NFC, and customers keep tapping cards that don't read?
That's not a failure at all. It's a feature gap. The card and the customer are both doing everything correctly. The terminal simply doesn't have the antenna hardware to receive the signal yet. Deciding whether adding NFC makes sense for that location, and what it costs against the transaction volume it might recover, is covered separately in do you really need an NFC card reader on your ATM.