Staff Answer
Jul 21, 2026 - 06:59 AM
If your No Flow light is on and your pump is on and running normally, start with these troubleshooting steps.
No Flow LED light is flashing:
No Flow LED light is flashing:
- The system has detected that water flow has been restored, and is ensuring constant and steady flow. This light may blink for 30-60 seconds after flow has been restored.
No Flow LED light is on solid:
- The Flow Switch is not being triggered by water movement.
- Ensure that the Flow Switch cord is connected to the bottom of the Control Module.
- Ensure that the return line has pressure and the water flow rate exceeds 25 gpm.
- Ensure that the Flow Switch itself is facing the correct direction in the plumbing. Refer to the arrow on the top of the sensor for reference, make sure the arrow is pointing in the same direction as the water flow.
- Ensure that the Flow Switch has not been installed too near to an angled pipe union or change in direction in the plumbing. The manual specifies at least 6-12" of straight pipe before the water enters the Flow Switch.
Inspect the flow switch itself, including its cable to make sure that the wire is free of damage and that it is fully and securely connected to the controller, free of dirt / corrosion / interference from pets. Additionally, if you are using a variable-speed pump, turn it on to its high speed setting and wait a couple minutes to see if the No Flow light goes away.
If these troubleshooting steps don't help to address the issue, there may be a component that needs to be replaced, such as the flow switch for itself. Contact us for additional assistance.
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