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Larry KirkAug 9, 2025
What to do if my Thermo Scientific Water Filtration System pump does not run but the display lights?
- AAnthony WilliamsAug 9, 2025
If the pump of your Thermo Scientific Water Filtration System isn't running but the display lights are on, here's what you can check: * Ensure the pump protector, feedwater line pressure switch, or jumper plug is correctly connected to the pump module receptacle on the left side of the pump housing. If using a Thermo Scientific pressure switch in the feedwater line, the pump needs a pressure of 0.35 kg/cm2 (5 psi) to start. * Make sure the feedwater line shutoff valve is open or that the feedwater reservoir is full. * If you're not using a pump protector, verify that a jumper plug is installed.