Charger Failure
Kohler Battery Charger Output Failure

Controller displays “Battery Charger Failure” or similar alarm; battery voltage slowly drops over days.

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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

Internal charger electronics failure, Blown charger input fuse or tripped breaker, No AC supply to charger, Loose charger output wiring

How to Fix / Troubleshooting

Safety first: Turn generator OFF and open main breaker. Disconnect battery negative before working on charger wiring.

  • Verify AC supply: Check the breaker or fuse feeding the charger from the utility panel or internal control box. Reset or replace if tripped/blown.
  • Inspect charger: Locate the charger module. Check for indicator LEDs (if equipped). No lights may indicate no power or internal failure.
  • Measure output: With AC power present and battery connected, measure DC voltage at the charger output terminals. If 0 V or far below spec, the charger is likely failed.
  • Check wiring: Tighten all DC output connections from charger to battery. Look for damaged insulation or corrosion.

If the charger has failed, replace it with a Kohler-specified charger of the same rating. Until replaced, periodically charge the battery with an external charger to maintain starting capability.

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Repair Difficulty

Medium 3/5

Required Part

Battery Charger
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