E9 appears during preheat; unit may hiss excessively or never reaches set pressure.

Safety first: Unplug and fully depressurize the cooker before disassembling any valve parts.

• Disassemble float valve: Remove the float valve cap and pin according to the manual. Clean the pin, O-ring, and channel with warm soapy water. Rinse and dry thoroughly.
• Inspect O-rings: Check the small silicone O-rings on the float valve and steam release valve for cracks, flattening, or cuts. Replace any damaged O-rings.
• Check steam release valve position: Ensure the steam release handle or knob is set to the correct sealing position for pressure cooking.
• Reassemble carefully: Reinstall all valve components in the correct order and orientation. Misassembly can prevent proper sealing.
• Test operation: Run a short pressure cycle with water only. If E9 reappears or the unit still fails to seal, the float valve assembly may need replacement.