Centurion Failure to Re-Transfer to Utility

Transfer switch remains on generator power after utility is restored; generator continues to run.

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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

Utility sensing circuit failure in ATS, Stuck transfer switch contacts, Faulty utility voltage sensing on Centurion controller, Control wiring open circuit

How to Fix / Troubleshooting

Safety first: Do not manually force the switch under load. Have a qualified person shut down generator and utility before operating ATS manually.

  • Confirm utility power: Verify that utility voltage is present at the line side of the ATS.
  • Inspect sensing fuses: Some ATS units have small fuses for sensing circuits; replace if blown.
  • Manual retransfer (qualified only): With both sources off, use the manual handle to return the switch to utility position, then restore utility power.

When to call a technician: A technician should test the ATS control board and Centurion controller sensing circuits and replace faulty components.

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Repair Difficulty

Professional Required 5/5

Required Part

ATS Control Board
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