Dishwasher Not Cleaning

About This Problem

When dishes come out dirty or spotted, several issues could be at play including water temperature and spray arm problems.

Common Symptoms

• Food particles left on dishes
• Cloudy or spotted glasses
• Dishes come out wet
• Detergent residue on dishes
• Musty odor in dishwasher

Possible Causes

• Clogged spray arms
• Low water temperature
• Faulty water inlet valve
• Detergent dispenser problems
• Hard water buildup
• Improper loading
• Filter needs cleaning

What You Can Try

• Clean spray arms and filter
• Check water heater temperature
• Use rinse aid for hard water
• Don't pre-rinse (modern detergents need food)
• Load dishes properly
• Run hot water before starting cycle

What a Technician Should Check

Direct answer: A professional diagnosis for dishwasher not cleaning should confirm the symptom, reproduce the failure when possible, inspect the most likely causes, and explain whether the issue is urgent. The quote should separate labor, parts, and any safety-related recommendations before work starts.

• Confirm when the dishwasher problem started
• Check power, controls, airflow, water, gas, or drainage as relevant
• Test the most common failure points before replacing parts
• Explain repair urgency and whether continued use is risky

Repair or Replace?

Repair usually makes sense when the equipment is otherwise reliable, parts are available, and the fix addresses a clear failure. Replacement becomes more reasonable when the same issue repeats, the unit is near end of life, or the repair cost approaches a meaningful share of replacement cost. We explain both paths before you decide.

Frequently Asked Questions