MachineKitchenAid KDPM604KPS

DifficultyEasy

Time30–60 minutes

What you saveUsually free vs $100–$300 professionally

⚠️ BEFORE YOU START

Standing dishwasher water can hide glass shards — bail with a cup, not bare cupped hands.

Tools

Cup and towels for bailing
Screwdriver
Wet/dry vac (helpful)

Parts

None for most fixes; drain pump if the whole path checks clear

Step by step

1 Bail the standing water

Cup, towels, or wet-vac the pool so you can see the tub floor.
2 Clean the filter and sump

Twist out the filter (see the filter guide) and check the sump beneath for the usual suspects: glass, labels, a pistachio shell perfectly sized to block the drain port.
3 Check where the hose ends

Under the sink: is the drain hose kinked? If it connects to a garbage disposal installed in the last year, verify the knockout plug was punched out — the #1 "new disposal" mystery.
4 Clear the air gap if you have one

The chrome cylinder by the faucet: pop its cap and clean out the debris. A clogged air gap backs the whole system up.
5 Run a rinse cycle and listen

A healthy drain pump makes a steady hum with gurgling water. Silence or grinding with a clear path = the drain pump itself — cheap part, moderate access.

KitchenAid KDPM604KPS notes & error codes

On premium dishwashers the wash pump is the expensive part and the filter is the free one, and a clogged filter mimics a dying pump almost exactly. Always clean and re-test before quoting a pump on a machine at this price.

Code	What it means
F8 E4	Overfill or flood condition
F9 E1	Drain fault
F7 E1	Heating fault
F6 E4	Inlet fault

Full details for this machine — common problems, causes, and costs — are in the KitchenAid KDPM604KPS repair guide. The general version of these instructions is here.

🔧 WHEN TO CALL A PRO

If the path is clear and the pump is silent, replacing it means tipping the machine out from the counter on most models — a fair place to hand off, and still a modest repair bill. If you'd rather skip it entirely, find a dishwasher repair pro near you →