Frigidaire · Dishwasher

E4

Flood Switch Activated

Severity

High

When a Frigidaire Dishwasher shows E4 on its display, the internal diagnostic system has flagged a condition known as "Flood Switch Activated". Most repairs for this code are straightforward and can be completed at home.

Owner's Summary

The flood protection sensor under your Frigidaire dishwasher has been activated by water in the base pan. Unplug the machine and dry the base before investigating the source of the leak.

Symptoms

Frigidaire dishwasher stopping, E4 displayed, water visible under appliance

Common Causes

Water leak into base pan
Door gasket damaged or misaligned
Cracked pump housing
Loose internal hose fitting

How to Fix

1 Unplug machine and remove kick plate
2 Dry base pan with towels
3 Identify leak source while running short cycle with kick plate off
4 Replace door gasket, pump housing or hose as needed

Tools You'll Need

Screwdriver Set Pliers Towels / Bucket Replacement Gasket

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

E4 on Frigidaire indicates the base float switch has closed. The PCB immediately halts all outputs when this input pin goes active. The switch remains closed until the base pan is physically dry and the float returns to the down position.

Is It Safe to Keep Using?

Urgent. Water in the base pan will damage the motor and electronics. Address immediately.

Technician's Pro Tip

Using dishwasher pods that are too large for the detergent dispenser can cause them to expand before the dispenser opens — the resulting excess suds overflow the sump and drip into the base pan, triggering E4 without any mechanical leak. Try a cycle with powder detergent to rule this out.

Related Codes

E1 — Samsung Dishwasher

Water Supply Error

High

E2 — Samsung Dishwasher

Water Temperature Too High

Medium

E3 — Samsung Dishwasher

Water Not Heating

Medium

Frequently Asked Questions

What does error code E4 mean on a Frigidaire Dishwasher?

Code E4 on a Frigidaire Dishwasher indicates "Flood Switch Activated." In practice, the most common trigger is water leak into base pan. Severity is rated high, and typical repair costs range from $10 to $280.

Can I fix E4 myself, or do I need a technician?

Many cases of E4 can be resolved without a technician. The first step to try: unplug machine and remove kick plate. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code E4 showing?

Urgent. Water in the base pan will damage the motor and electronics. Address immediately.

How much does it cost to repair E4 on a Frigidaire Dishwasher?

Repair costs for code E4 typically range from $10 to $280. Door gasket: $15–$60; Pump housing: $40–$120; Internal hose: $20–$80. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$10 – $280

Door gasket: $15–$60; Pump housing: $40–$120; Internal hose: $20–$80