E18
Winco Air Intake Restriction

Controller displays E18 / AIR FILTER or INTAKE RESTRICTION warning and engine performance is poor.

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Possible Causes

Clogged air filter element, Blocked intake louvers on enclosure, Debris in air filter housing

How to Fix / Troubleshooting

Safety first: Disable AUTO and shut down the engine before opening the enclosure.

  • Inspect air filter: Open the air filter housing and remove the air filter element. If dirty or oil-soaked, replace with a genuine Winco-specified filter.
  • Clean housing: Wipe out dust and debris from the air box. Ensure the cover gasket is intact.
  • Check intake vents: Clear leaves, snow, or nests from the generator intake louvers.

After replacement, clear the E18 warning and run the unit under load to confirm normal operation.

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Repair Difficulty

Very Easy 1/5

Required Part

Air Filter
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