Ink leaks waste fluid, ruin print quality, and can short internal components. Learn what causes leaks and how to stop them fast.
Why CIJ leaks are serious
A leaking head isn’t just messy—it’s a major fault risk. Ink can short electrical components, contaminate sensors, and cause permanent head failure.
Symptoms of head leakage
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Ink pooling around the nozzle or gutter
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Ink dripping from umbilical or connectors
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Fault codes: Gutter error, Charge fault, Pressure too high
Likely causes & fixes
| Cause | Fix |
|---|---|
| Nozzle clog or partial restriction | Clean or replace nozzle filter |
| Failed seal or O-ring in printhead | Disassemble and replace seals |
| Overpressure in ink system | Check pressure sensor and VMS calibration |
| Damaged umbilical or fittings | Inspect and replace connectors |
| Ink too hot or volatile | Confirm fluid spec and storage temp |
What to do immediately
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Power down the printer
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Disconnect head and clean all external surfaces
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Inspect nozzle, gutter, and return line for blockages
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Check for seal or housing damage
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Replace damaged parts and run system diagnostics
Prevent future leaks
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Perform weekly nozzle cleans
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Avoid overtightening fittings
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Replace filters and restrictors on schedule
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Use only verified Needham inks and solvents