Jackson dishwasher shows E11; detergent pump or chemical dosing system fault is indicated.

Safety first: Wear appropriate chemical-resistant gloves and eye protection when handling detergents and rinse aids.

• Check chemical levels: Verify that the detergent container is not empty and that the pickup tube is fully submerged.
• Inspect tubing: Follow the detergent tubing from the container to the injection point. Look for kinks, pinches, or crystallized chemical blocking the line. Replace hardened tubing.
• Prime the pump: Many Jackson models allow manual priming of the detergent pump. Use the prime function to draw chemical through the line and observe flow.
• Test detergent pump: With power off, inspect the peristaltic pump head and roller assembly. Replace worn tubing or rollers. With power on (qualified personnel only), verify that the pump receives voltage during dosing.
• Check control outputs: If the pump is good but never energizes, the control board’s chemical output or relay may be faulty and require replacement.

Improper detergent dosing can lead to poor cleaning and residue; restore proper operation and recalibrate dosing per Jackson’s specifications.