Toshiba Float Valve Seal Failure

Steam or hot water spurts from around the float valve area during pressure buildup.

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Possible Causes

Damaged or hardened float valve silicone cap, Debris preventing float from sealing, Worn float valve seat in lid

How to Fix / Troubleshooting

Safety: Keep face and hands away from the float valve during operation.

  • 1. Clean float valve: Remove the float valve pin and silicone cap. Clean all parts and the valve seat in the lid.
  • 2. Inspect silicone cap: Replace if cracked, hardened, or misshapen.
  • 3. Reassemble correctly: Install the float valve components in the correct order as per Toshiba manual.
  • 4. Test with water: Run a water-only pressure cycle and observe the float area for leaks.

Do not plug the float valve hole; it is a critical safety component.

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Repair Difficulty

Very Easy 1/5

Required Part

Float Valve & Silicone Cap
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