Autotrol Clock accuracy or backup failure

Autotrol softener’s time-of-day clock drifts or loses time between power outages

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Possible Causes

Aging internal clock circuit, Failed backup capacitor/battery, Unstable power supply

How to Fix / Troubleshooting

Safety: No high-voltage work is required; unplug before removing covers.

  • Verify power stability: Ensure the transformer is firmly plugged in and the outlet is not switched or intermittent.
  • Monitor drift: Note how much time is lost or gained over several days. Minor drift may be normal on older controls.
  • Backup failure: If time resets after brief outages, the internal backup has likely failed. Replace the electronic control board.
  • Consider upgrade: For significant drift, upgrading to a newer Autotrol control head may be more reliable.
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Repair Difficulty

Easy 2/5

Required Part

Autotrol electronic control board
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