Kohler Exercise-Only Operation / No Load Transfer

Generator runs its weekly exercise but never transfers load during real outages

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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

Exercise mode configured as no-load test, ATS not wired for automatic transfer, Transfer inhibit setting enabled, Fault in ATS control circuit

How to Fix / Troubleshooting

Safety first: Do not simulate outages by manually disconnecting utility without understanding the system. Consult the manuals.

  • Check exercise settings: In the Kohler controller menu, verify whether the exercise is set as load or no-load. This does not affect real outage transfer but clarifies behavior.
  • Simulate outage (pro): With a qualified electrician, simulate a utility failure at the ATS to verify that the ATS receives the signal and attempts to transfer.
  • Control wiring: Inspect the start/transfer control wiring between generator and ATS for continuity and correct terminations.

If the ATS never transfers under real outages, its sensing or control board may be faulty and should be tested by a professional.

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Repair Difficulty

Hard 4/5

Required Part

ATS Control Board
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