Centurion No Transfer to Generator

Transfer switch does not transfer to generator power during outage even though generator is running normally.

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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

Failed Centurion automatic transfer switch (ATS) coil, Control wiring fault between generator and ATS, Utility sense circuit stuck, Mechanical binding in switch mechanism

How to Fix / Troubleshooting

Safety first: Only qualified persons should work inside the transfer switch. Turn OFF generator and utility power before opening the ATS.

  • Check control cable: Inspect the low-voltage control cable between generator and ATS for damage.
  • Verify generator signal: Confirm that the generator is sending a transfer signal (consult Centurion wiring diagram).
  • Manual operation test: Some ATS units have a manual handle to test movement (with all power off). Ensure mechanism moves freely.

When to call a technician: ATS coil and control circuit diagnosis should be performed by a licensed electrician or generator technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Automatic Transfer Switch Contactor
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