How to fix a cash drawer that won’t open
Android
Sunmi
Updated Aug 2026
A cash drawer is opened by the receipt printer, so if it won’t pop, the fix is usually with the printer or the cable between them — not RushFlow. Check the connection and that a receipt is actually printing.
Step by step
- Check the drawer-to-printer cableConfirm the drawer’s cable is firmly in the printer’s drawer/kick port.
- Confirm the printer printsThe drawer opens when the printer fires. If receipts aren’t printing, fix that first — see the printer-not-printing guide.
- Take a cash sale to testComplete a cash payment; the receipt should print and the drawer open. A manual key unlocks the drawer if you need it open now.
Frequently asked questions
Why won’t my cash drawer open?
The drawer is driven by the receipt printer, so check the cable to the printer’s kick port and make sure receipts are actually printing. If the printer works, the drawer should pop on a cash sale.
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