MachineWhirlpool WDT730PAHZ

DifficultyEasy

Time15–30 minutes

What you saveFree — and it prevents the two most common dishwasher service calls

⚠️ BEFORE YOU START

None. This is the single highest-value 20 minutes you can spend on any kitchen appliance.

Tools

Old toothbrush
Toothpick or wooden skewer
Sink with hot water

Parts

None — monthly maintenance

Step by step

1 Pull the bottom rack and find the filter

The cylindrical mesh filter sits in the tub floor, usually with a quarter-turn arrow marking. Twist counterclockwise and lift out — many have a flat coarse filter beneath that lifts out too.
2 Rinse and scrub

Hot water and a toothbrush on the mesh until water runs through freely. The grime you’re removing is what’s been re-spraying onto your glasses.
3 Check the sump while it’s open

Feel the exposed sump area for glass shards, fruit stickers, and pit fragments — remove anything that isn’t machine.
4 Pop off the spray arms

The lower arm usually lifts or unscrews; the upper arm unclips from the rack. Poke every jet clear with a toothpick and rinse the arms through.
5 Reassemble and run a cleaner cycle

Filter locked back in (it must click — a loose filter lets debris reach the pump), arms clicked on, then run the hottest cycle empty with dishwasher cleaner or citric acid. Repeat monthly — non-negotiable in Arizona hard water.

Whirlpool WDT730PAHZ notes & error codes

Function codes read out via a console button-press sequence (check the tech sheet in the door). Most no-start calls end at the control-lock feature or the latch — check both before booking.

Code	What it means
F9 E1	Drain fault
F8 E4 / F6-series	Fill/float faults
F5 E1	Door switch
F2 E2	UI/board communication

Full details for this machine — common problems, causes, and costs — are in the Whirlpool WDT730PAHZ repair guide. The general version of these instructions is here.

🔧 WHEN TO CALL A PRO

If cleaning doesn’t restore wash quality, water temperature or the circulation pump is next in line — a quick professional diagnosis beats replacing parts on a hunch. If you'd rather skip it entirely, find a dishwasher repair pro near you →