Maytag Dishwasher Isn't Cleaning Dishes

Before you start#

• Tools: Torx T20 driver, a wooden toothpick or bamboo skewer, a soft brush, and a thermometer (a candy or meat type works).
• Safety: Most of this needs no electrical disconnection, but if you open the inlet valve, kill power at the breaker first.

Step by step#

1. Check the water temperature. Maytag dishwashers want incoming water near 120 degrees F (about 49 degrees C) to activate detergent and cut grease. Run the kitchen tap hot, hold a thermometer in the stream, and if it reads below 115 degrees F, turn up the water heater. Running the hot tap for 30-60 seconds before you start the cycle puts hot water at the inlet immediately.
2. Clear every spray-arm nozzle. Lift off the lower arm (it pulls off its center post) and unclip the upper arm from under the top rack. Under bright light, clear each hole with a wooden toothpick, pushing debris inward to flush out later; for hard-water scale, soak the arms in undiluted white vinegar for 30 minutes. Spin each arm after refitting to confirm it turns freely.
3. Clean the Dual Power Filtration filters. Twist the cylindrical upper filter counter-clockwise and lift it out, remove the flat fine-mesh filter beneath, and take out the secondary ring filter if your model has one. Rinse and scrub all of it with a soft brush and dish soap — a clogged filter throttles the whole recirculation loop even with the pump at full speed. Refit flat mesh first, then the ring, then the cylinder twisted clockwise until it locks.
4. Free and check the chopper. With the filters out, nudge the stainless chopper blade in the sump with a wooden utensil (never a finger) to confirm it spins; a jammed chopper cannot grind food, so waste recirculates onto clean dishes. Clear any object and wipe grease from the sump floor and walls with a vinegar-dampened cloth.
5. Reassess detergent and loading. Fresh detergent matters — pods and powder fade a few months after opening. Confirm the dispenser opens fully during the cycle, and load so nothing tall blocks the lower arm's wide sweep, dirty sides facing the center spray.
6. Test the inlet valve flow. If temperature and spray arms are fine but cleaning is still poor, the tub may be underfilling. Start a cycle and listen: fill should run about 90-120 seconds, and a shorter fill or rapid clicking means a restricted valve screen. To clean it, cut power, shut the sink supply, drop the lower access panel (two 1/4-inch hex screws), disconnect the supply line at the inlet valve, and brush the screen with vinegar before reassembling.
7. Run a PowerBlast check. If your model has PowerBlast, run it empty with an upside-down mug on the top rack; water sitting inside the mug afterward confirms spray is reaching the top. If cleaning is poor even on PowerBlast, the cause is upstream — temperature, fill volume, or blocked arms. If Normal cleans poorly but PowerBlast is fine, you have marginal spray arms or slightly low temperature that only the boosted cycle overcomes.
8. Confirm the mid-cycle drain. A dishwasher that does not fully drain between wash and rinse redeposits food. Listen for the drain pump's low hum between phases; residue that appears only at rinse points to a failing mid-cycle drain. You can enter diagnostic mode (press three buttons in a 1-2-3, 1-2-3, 1-2-3 sequence within 8 seconds) to run each component, including the drain pump, on its own.

Symptom guide#