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⚠️ Seeing the E4 error on your Ninja Air Fryer PRO (AF140UK)? It usually means the door isn’t securely closed — here’s how to fix it fast and get cooking again.
🔧 In this video:
• Align and close the door properly
• Clean the door sensor to improve detection
• Reset your appliance to clear temporary glitches
• Inspect wiring for loose or damaged connectors
• Know when to contact Ninja support
📘 Official resources:
• [Ninja Support US](https://support.ninjakitchen.com/hc/en-us/articles/4402881919506-Contact-Us)
• [Owner’s Guide (UK)](https://support.ninjakitchen.co.uk/hc/en-gb/articles/13334608519580-AF140UK-Series-Ninja-Air-Fryer-4-7l-Pro-Owner-s-Guide)
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