Jackson dishwasher shows E13; spray arm rotation fault detected (often via current sensing or flow monitoring).

Safety first: Disconnect power and allow the machine to cool before reaching into the wash chamber.

• Remove and clean spray arms: Take out upper and lower spray arms. Use a toothpick or small brush to clear each jet hole of food particles, seeds, and scale. Rinse thoroughly.
• Inspect spray arm bearings: Check the hubs and bushings where the arms mount. Replace worn or cracked bushings that cause drag or wobble.
• Clean pump inlet and filters: Remove tank strainers and inspect the wash pump intake screen. Clear any obstructions that could reduce flow.
• Verify water pressure: Measure incoming water pressure at the machine’s supply. Ensure it meets Jackson’s minimum spec (often 20–25 psi or higher). Correct building plumbing issues if pressure is low.
• Check for kinked internal hoses: Inspect internal wash manifold hoses for kinks or collapse that would restrict flow.

Proper spray arm rotation is critical for cleaning and sanitizing; confirm free spinning by hand before returning the unit to service.