Whirlpool F8E4: Water Detected in the Drip Tray

High severity

An alarm sounds and F8E4 appears on a Whirlpool dishwasher's display when the float switch in the base pan senses water where there shouldn't be any — an active leak.

Applies to: Whirlpool dishwashers with electronic controls and a float switch in the base pan.

What it means

Underneath every Whirlpool dishwasher sits a shallow drip tray with a float switch resting in it, there specifically to catch leaks before they spread to the surrounding floor and cabinetry. F8E4 means that float has risen and tripped, telling the control board water is actively collecting in the base pan right now. Because this is a flood-prevention feature, the dishwasher stops itself rather than continuing a cycle while it's leaking.

Safety note: this code means standing water and electrical components are sharing the same space. If you can't safely reach the water shutoff, leave power on and the door closed rather than cutting power near visible water, and call a technician.

Common causes

New installations and detergent mistakes account for a large share of these:

A loose water supply connection, especially common right after a new installation
A disconnected or improperly seated float switch connector
Excessive suds from using the wrong type of detergent
A worn door gasket or internal leak

What you can check yourself

Work through the connections that are easy to reach before assuming a deeper leak:

On a new install, verify the water supply connection is tight, the rubber washer is seated properly, and the fitting is hand-tight plus an extra quarter to half turn with pliers
Check that the float switch connector under the unit is fully plugged in
Empty any standing water from the drip tray
Confirm you're using dishwasher-specific detergent, not dish soap
Press Cancel once to silence the alarm and again to clear the code, then investigate before running another cycle

A supply fitting that was only hand-tightened at install is one of the most common causes here, so it's worth checking even if the leak seems to be coming from somewhere else.

Call a professional when

If you can't find and fix an obvious loose connection or oversudsing cause, or water keeps returning to the drip tray, call a technician, since this points to an active leak that can cause water damage if ignored.

All Whirlpool codes — full list of Whirlpool fault codes and what each one means
Whirlpool F6E1 — no water fill detected
Whirlpool F9E1 — long-drain fault
Dishwasher Leak Detected / Water Under the Unit — symptom guide across brands

Sources

Whirlpool Product Help: F8E4 Error Code (Dishwasher)

This site is an independent reference, not a substitute for a licensed appliance technician or electrician, and is not affiliated with Bosch, Samsung, LG, Whirlpool, KitchenAid, or any other manufacturer named here. Dishwashers combine mains-voltage electrical parts with water. Always shut off both power and the water supply before opening the tub, pump, or heating element housing, and if a repair goes beyond checking filters, hoses, detergent, and visible debris, call a licensed technician.