Zojirushi Excessive Boil-Over / Vent Sputtering

Steam and liquid sputter excessively from the steam vent, making a mess on the countertop.

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Possible Causes

Overfilled pan, Incorrect rice type or starch-heavy foods without proper program, Clogged steam cap or vent, Missing or damaged inner pressure cap

How to Fix / Troubleshooting

Safety first: Steam is hot; keep hands and face away from the vent during operation.

  • Reduce fill level: Stay below the maximum markings for the selected food type.
  • Use correct program: Select the program designed for porridge, mixed rice, or high-starch foods.
  • Clean steam cap and vent: Remove the steam cap and inner pressure cap (if present). Wash thoroughly, clear all holes, rinse, and dry.
  • Check for missing parts: Ensure all vent components and gaskets are installed as per the manual.

When to call a technician: If sputtering continues with correct use and clean vents, internal pressure control may need inspection.

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Repair Difficulty

Easy 2/5

Required Part

Steam Cap, Inner Pressure Cap
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