Dishwasher runs for an unusually long time; cycles seem to never finish or take several hours.

Safety first: No internal access is required for initial checks.

Step-by-step checks:

• Water temperature: Run hot water at the sink until it is hot before starting the dishwasher to reduce heating time.
• Cycle selection: Note that eco or heavy cycles can legitimately run 2–3 hours. Try a normal or express cycle for comparison.
• Clean sensors: Clean filters and run a dishwasher cleaner cycle to help turbidity sensors read correctly.
• Observe behavior: If the unit repeatedly drains and refills or stalls at one stage, there may be a sensor or control issue requiring service.

Warning: Do not interrupt cycles repeatedly; this can leave detergent residue and confuse adaptive controls.