IC40 Flow Switch Problem


New member
Jul 20, 2019
Moved from here.
Same problem. Intermittent flow switch. Just changed it out. Again. Same problem.

Cell is a few years old. Why would it give a no flow red light if the cell is bad? When the flow light is green, cell come on, works perfect.
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Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

Maybe you just have intermittent low flow???

When was the last time you cleaned your filter? What is your filter pressure?

One thing you can do.. As a test only.. short the red and black wires going into the cell.. If the low flow light comes on with the wires shorted, the cell is bad.

Do not leave the wires shorted when the pump is off.. or it could go "Boom!!"


Jim R.