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Hayward AquaRite Error NO FLOW

Flow switch not seeing consistent flow. Check pump, valves, switch, filter.

The flow switch isn't seeing steady flow. Check the pump, valves, filter, and switch direction.

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Full answer & models

On a Hayward AquaRite, the No Flow light means the flow switch is not reporting consistent flow. It normally flashes 10 to 60 seconds at pump start. Check the pump and valves, flow switch orientation and placement, connector and wire, and clean the filter and baskets.

Applies to: AquaRiteAquaRite with TurboCell
Also searched as: No Flow light, AquaRite no flow, flow switch

Never bypass or repair the flow switch.
Why
The flow switch is a safety device. Never bypass, jumper, or repair the switch or its wire. Replace it if damaged. Turn power off before handling connections.

What NO FLOW means

Flow switch not seeing consistent flow. Check pump, valves, switch, filter.

More detail
Per Hayward AquaRite Troubleshooting Guide AQR159d, the No Flow LED means the flow switch is not reporting consistent flow; it should flash for 10 to 60 seconds at pump start while flow is verified. The switch needs at least 11 GPM, works in one direction only (arrow on top), and should have 12 inches of straight pipe ahead of it (the TurboCell counts). The flow switch is a safety switch: never repair it; replace it (GLX-FLO-RP).

5-minute checks

Fix it step by step

Step 1 of 5

  1. Check pump and valves

    • 5 min
    • None
    • DIY

    Water must reach the flow switch; the switch needs at least 11 GPM.

    More detail

    Check pump and valves.

    Variable-speed pump: try a higher run speed.

    Did the code clear?

  2. Check switch direction

    • 5 min
    • None
    • DIY

    12 inches of straight pipe ahead of the switch; arrow pointing with the flow.

    More detail

    Check placement and orientation.

    If reversed, rotate the switch to match the flow. Do not overtighten.

    Did the code clear?

  3. Inspect connector and wire

    • 10 min
    • None
    • Caution

    Damaged or corroded pins or wire mean replace the switch.

    More detail

    Inspect connector and wire.

    Unplug, inspect the RJ-11-style pins, plug back in, and wait 60 seconds. A damaged wire reads as an open circuit and suspends chlorination.

    Did the code clear?

  4. Clean filter and baskets

    • 20 min
    • None
    • DIY

    Remove debris, backwash or clean the filter, run the pump, wait 60 seconds.

    More detail

    Clean filter and baskets.

    AQR159d step 3F.

    Did the code clear?

  5. Switch or board

    • Decision
    • Known-good flow switch
    • Pro decision

    Hold a working switch closed 60 seconds. If the light clears, replace the switch; if not, the main PCB (GLX-PCB-RITE) is next.

    More detail

    Test with a known-good switch; then the main PCB.

    If the light remains on after a board replacement, contact Hayward technical support via Hayward.com.

    Still showing NO FLOW?Still NO FLOW → see the partNeed a pro → call a pro

Code cleared. Nice work.

Recheck chlorine in a week. Pros do the same.

Back to top

Fixed after any step? Recheck chlorine in a week. Still NO FLOW after step 5? See the replacement part or call a pro.

Call a pro if…

  • The light stays on with confirmed good flow and an undamaged switch.
  • Board replacement is indicated.

Part you'll likely need

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Only if the switch connector or wire is damaged, or a known-good switch clears the light.

Hayward GLX-FLO-RP flow switch

Hayward's guide calls for replacing the flow switch, never repairing it, when the connector or wire is damaged.

Fits: AquaRite

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FAQ

Is a flashing No Flow light at startup normal?

Yes. It flashes 10 to 60 seconds while flow is verified (AQR159d).

Minimum flow for the switch?

11 GPM.

Can I bypass the flow switch?

No. It is a safety switch; replace it if compromised.

Where is this documented?

Hayward AquaRite Troubleshooting Guide AQR159d.

Source: Hayward AquaRite Troubleshooting Guide AQR159d. Written by a Florida pool service owner. Updated 2026-10-15.