Amana Dishwasher Not Cleaning Dishes: Causes and DIY Fix Guide

If your Amana dishwasher leaves food residue or cloudy glassware, the most common causes are clogged spray arms, a dirty filter, or a failing wash impeller. Start by cleaning the filter and spray arm nozzles, then verify the incoming water temperature (should be 120°F). If the problem persists, inspect the wash impeller for cracks.

Likely Causes: Why Dishes Come Out Dirty

Most Amana dishwasher cleaning failures boil down to four culprits. The table below maps symptoms to likely causes and quick checks.

Symptom	Likely Cause	Quick Check
Food bits on top-rack dishes	Clogged upper spray arm nozzles	Remove spray arm and rinse with water
Spotty or hazy glassware	Hard water deposits or empty rinse aid	Check rinse aid dispenser and fill
Greasy film on plastic and glass	Water temperature too low (below 120°F)	Run hot water at the sink before starting cycle

Other common causes include a dirty filter (blocks water flow), a cracked wash impeller (can’t propel water), or using the wrong detergent type (pods vs. powder can behave differently in Amana models). For broader context on appliance failures, our article on common issues with amana washing machine covers similar part-failure patterns that apply here.

According to the Association of Home Appliance Manufacturers (AHAM), dishwasher performance degrades significantly when the filter is not cleaned at least every 30 cycles. Regular maintenance is the single most effective prevention.

What You Need Before Starting the Fix

Before digging in, gather these tools and follow safety steps. Run down this checklist:

• ✅ Unplug the dishwasher or turn off the circuit breaker.
• ✅ Turn off the water supply under the sink.
• ✅ Remove the lower dish rack and any loose debris from the bottom.
• ✅ Have a flat-head screwdriver, multimeter (for continuity tests), and needle-nose pliers ready.
• ✅ Locate the filter assembly (usually a cylindrical or flat mesh piece at the bottom center).
• ✅ Order replacement parts (wash impeller, spray arm, or filter) only after confirming a defect.

Step-by-Step Fix: Clean, Check, and Replace

Start with the fastest fixes and move to more involved checks. Stop each step once you find and correct the problem.

Step 1: Clean the Filter

The filter catches food scraps. If it’s clogged, water can’t circulate.

• How to do it: Twist the filter counterclockwise and lift it out. Rinse under running water, scrubbing with a soft brush if debris is baked on. Reinstall by pressing down and twisting clockwise until it locks.
• What to look for: Water pooling around the filter after cleaning means it wasn’t seated properly.
• Common mistake: Using a wire brush or steel wool – this scratches the mesh and makes future cleaning harder.

Step 2: Clean the Spray Arms

Clogged nozzles prevent water from hitting dishes. Both upper and lower arms need inspection.

• How to do it: Unsnap each spray arm (check for a locking tab or nut). Use a toothpick or paper clip to clear each nozzle hole. Flush the arm with warm water. Reattach and spin it by hand to confirm free rotation.
• What to look for: Water should stream out of every nozzle when you hold the arm under the faucet.
• Common mistake: Overtightening the mounting nut – this can crack the arm base. Hand-tighten only.

If you notice hard-water buildup on the arms or dishes, applying the rinse and drying strategies from our guide on essential tips for cleaning an amana top load washing machine can help prevent future residue.

Step 3: Check Incoming Water Temperature

If water isn’t hot enough, detergent won’t dissolve and grease won’t break down.

• How to check: Fill a cup from the kitchen faucet nearest the dishwasher. Measure with a candy thermometer. Target temp is 120°F (49°C) – not above 140°F to avoid damage.
• What to do if low: Run the kitchen faucet hot for 3 minutes before starting the dishwasher. If it still stays below 120°F, check your water heater setting.
• Common mistake: Assuming the dishwasher heats the water itself – most Amana models rely on your home’s hot water supply.

Step 4: Inspect the Wash Impeller

The wash impeller (sometimes called the chopper blade or wash pump) grinds food particles and pushes water. If it’s cracked or broken, water pressure drops.

• How to check: Remove the lower spray arm and filter. Look at the plastic impeller blade at the bottom center. Rotate it by hand – it should spin freely and have no chunks missing.
• Fix: If damaged, replace the impeller (part number varies by model; check your manual or look near the model tag inside the door). Use a multimeter to test motor continuity if the impeller still seems okay but the dishwasher won’t fill or drain.
• Common mistake: Forgetting to check the drain check valve after replacing the impeller – a stuck valve can mimic impeller failure.

Step 5: Verify Detergent and Rinse Aid

• Use a fresh, high-quality dishwasher detergent – avoid DIY or homemade mixes. Pods generally work better than powder in Amana models.
• Fill the rinse aid dispenser until the indicator window is full. This prevents water spots and helps drying.
• Common mistake: Overfilling the detergent cup – that leaves sticky residue. Fill only to the line.

Stop Threshold: When DIY Ends and a Pro Must Take Over

If you’ve completed all five steps above and dishes are still dirty, listen for these concrete signs that the problem has moved beyond simple fixes:

• Water temperature is verified at 120°F, the filter is clean, spray arms are clear, and the wash impeller spins freely with no cracks. Yet dishes remain visibly soiled after a full cycle. This points to a failing main control board, a worn wash motor, or a defective water inlet valve.
• Grinding or humming noise during the wash cycle with no water spraying – the wash motor or pump assembly likely needs replacement.
• Standing water (more than a cup) in the bottom after a complete cycle – drain pump, check valve, or drain hose blockage. If you’ve already cleared the filter and drain line, the pump itself is suspect.
• Error codes (F6E2, F7E1, or any flashing sequence) – these indicate sensor or control board issues requiring professional diagnosis and often model-specific replacement.

When any of these conditions exist, stop all DIY steps and contact a qualified appliance repair technician. Attempting further disassembly on a control board or pump motor without proper diagnostic equipment risks damaging the dishwasher beyond economic repair. If your unit is still under warranty, call Amana support first – many sensor and motor failures are covered.

For error codes or wash motor issues, check our guide to troubleshoot amana washing machine problems solutions – many electrical diagnostics transfer directly because Amana dishwashers and washers often share thermistor and sensor designs.

Success Check: How to Know the Fix Worked

Run a short cycle (the “Light Wash” or “Quick Wash” setting) with a single glass and a few plates. After the cycle finishes, open the door and inspect:

• Dishes should be free of visible food particles and water spots.
• The bottom should have less than a cup of standing water.
• The spray arms should have stopped spinning with water pressure.

If everything passes, your fix worked. If not, revisit Step 4 (wash impeller) and Step 1 (filter) – the most common oversight is failing to fully reseat the filter.

Frequently Asked Questions

Why does my Amana dishwasher leave white residue on glasses?

White residue is usually hard water mineral deposits. Fill the rinse aid dispenser and consider using a dishwasher cleaner (e.g., Finish Jet-Dry or Lemi Shine) once a month. If the water in your area is very hard, increasing detergent dose may help.

What causes a “no wash” cycle where the dishwasher fills but doesn’t spray?

This usually points to a clogged wash impeller, a broken impeller blade, or a faulty wash motor. Check the impeller as described in Step 4. If the impeller spins freely but water doesn’t circulate, the motor likely needs replacement.

How often should I clean the Amana dishwasher filter?

Clean it every 1–3 months depending on usage. If you run the dishwasher daily, clean it monthly. For lighter use, every 10–15 cycles is fine. Ignoring the filter is the number one cause of poor cleaning.