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Jeffrey BlakeSep 2, 2025
What to do if SOFT LED is off and pump motor doesn't operate on Hach Measuring Instruments?
- SsusancolemanSep 2, 2025
If the SOFT LED light isn't on and the pump motor isn't running on your Hach Measuring Instruments, check the following: * Ensure the power switch is on. * Connect the power cord securely. * If needed, replace the fuses.









