Dishwasher displays E12 and drying performance is poor; sometimes accompanied by white spots on dishes.

Safety first: Switch off power before working on the door dispenser.

• Refill rinse aid: Open the dispenser on the inner door and fill with a Sharp-compatible rinse aid. Adjust the dosage setting according to water hardness.
• Clean dispenser outlet: Wipe the dispenser cap and outlet area to remove dried residue that may block flow.
• Reset cycle: After refilling, run a full cycle and check if E12 clears.
• Inspect dispenser wiring: If the error persists, remove the inner door panel and inspect the wiring to the rinse aid dispenser and sensor.
• Replace dispenser: Install a new dispenser assembly with integrated sensor if the original is faulty.