Crock-Pot Excessive Foaming / Blocked Anti-Block Shield

Steam and liquid spray out violently from the steam release valve during pressure release.

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Possible Causes

Cooking foamy foods (pasta, beans) without enough oil or fat, Anti-block shield clogged with starch, Releasing pressure too quickly for contents

How to Fix / Troubleshooting

Safety first: Keep hands and face away from the steam vent. Use a long utensil to operate the valve if needed.

  • Natural release: For foamy foods, allow pressure to drop naturally for 10–15 minutes before switching to quick release.
  • Clean anti-block shield: Once cool and depressurized, remove the lid and take off the anti-block shield (metal or plastic cover over the steam port). Clean thoroughly to remove starch buildup.
  • Adjust recipes: Add a small amount of oil and avoid overfilling when cooking beans, grains, or pasta.
  • Inspect valve: Ensure the steam release valve path is clear and not partially blocked, which can cause erratic spraying.
  • Replacement: If the anti-block shield is damaged or warped, replace it as part of the lid steam assembly.
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Repair Difficulty

Very Easy 1/5

Required Part

Anti-Block Shield / Steam Vent Assembly
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