This article helps you fix incorrect ‘Solvent Low’ alerts by checking sensor calibration, blockages, and tank wiring.
What’s happening?
You’ve topped up the solvent tank—but the printer still thinks it’s empty. The issue usually lies with the level sensor or solvent line blockage.
Common causes
| Cause | Fix |
|---|---|
| Blocked solvent line or tank filter | Clean or replace filter screen |
| Stuck or misaligned float sensor | Inspect tank internals and realign sensor |
| Faulty level sensor | Run sensor diagnostics or replace component |
| Tank cable unplugged or damaged | Reseat wiring or replace connector |
How to fix
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Power off the printer
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Remove solvent tank cover
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Clean internal filters and confirm sensor moves freely
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Reseat all sensor connections
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Reboot and confirm if alert clears
Avoid this in future
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Clean solvent tank monthly
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Don’t overfill—may block float
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Only use compatible Needham solvents (viscosity impacts sensor readings)