Saci Stuck Relay / Control Fault

Pump will not turn off from the keypad, only by cutting power at the breaker

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Welded relay contacts on control PCB, Shorted control output transistor, Keypad logic failure, External automation forcing run command

How to Fix / Troubleshooting

Safety first: Use the breaker to safely disconnect power before opening the control panel.

  • Check external controls: Disconnect any external run commands or automation wiring and test if the pump can be stopped locally.
  • Inspect PCB: Look for a relay on the Saci control board with signs of overheating or discoloration.
  • Reset controller: Perform a factory reset if available and re‑test stop/start functions.

If the pump still cannot be stopped via the keypad, the control PCB likely needs replacement. Do not rely solely on the breaker for daily operation.

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Repair Difficulty

Hard 4/5

Required Part

Motor Control PCB
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