Warning: Disconnect power before servicing.
ErrBase

Whirlpool Dishwasher F8 E4 Error Code: Wash Motor Fault

Quick Answer

F8 E4 on a Whirlpool dishwasher signals a wash motor fault. On the WDT780SAEM and similar DTM platform models, the most common physical cause is a cracked plastic impeller hub rather than a failed motor winding. Inspect the impeller before ordering a motor.

F8 E4 on a Whirlpool dishwasher signals a wash motor fault. On the WDT780SAEM and similar DTM platform models, the most common physical cause is a cracked plastic impeller hub rather than a failed motor winding. Inspect the impeller before ordering a motor. If the impeller is intact, test motor winding resistance (5-10 ohms); a reading outside that range confirms motor failure. The motor control board relay is the next suspect if both motor and impeller check out.

WhirlpoolDishwasherSeverity: highDifficulty: intermediate88% DIY Success
Time to Fix
30–90 min
Difficulty
intermediate
Parts Cost
$80 – $160
Tools Needed
Multimeter, Torx T20 screwdriver

What Does the F8 E4 Code Mean?

The DTM platform's direct-drive wash motor failed to start or tripped a current fault. On WDT series models, a cracked impeller is the leading cause; check it before condemning the motor.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Cracked or jammed plastic impeller hub on the direct-drive motor40%
Wash motor winding failure (open or shorted winding)24%
Wiring harness connector corrosion between motor and board22%
Motor control board relay fault14%

Symptoms You May Notice

  • F8 E4 displayed at start of wash cycle
  • Dishwasher fills with water then stops without washing
  • No spray arm rotation heard during cycle
  • Cycle aborts within 2-3 minutes of starting

Can you reset a Whirlpool dishwasher to clear the F8 E4 code?

Hold Cancel/Drain for 3 seconds to clear the F8 E4 code. The code will return on the next cycle if the motor fault is not resolved. Do not continue running the dishwasher with a failed motor impeller as debris can damage the pump chamber.

Tools Required for Diagnosis

MultimeterTorx T20 screwdriverFlathead screwdriverNeedle-nose pliers

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Remove the lower dish rack and bottom spray arm (twist

Remove the lower dish rack and bottom spray arm (twist counterclockwise). Look down into the impeller hub at the center of the tub floor. Inspect for visible cracks in the plastic hub or any foreign debris jamming the impeller blades.

2

Disconnect power

3

Inspect the motor wiring harness connector at both ends for

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Wash Motor AssemblyW10765009 · $80–$150
Motor Control BoardW10803728 · $90–$160

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $120 (Parts) vs $700 (New Machine)

Frequently Asked Questions

Why does Whirlpool recommend checking the impeller before the motor on F8 E4?
The WDT series uses a direct-drive motor with a plastic impeller hub that is more prone to cracking than the motor winding itself failing. Replacing the motor when the real issue is a cracked impeller wastes $80-150 unnecessarily; the impeller ships with a new motor assembly anyway.
Can I run the dishwasher with a broken impeller?
No. A broken impeller means no water is being moved through the spray arms, so dishes will not be cleaned. Continuing to run it can overheat the pump chamber and cause secondary damage.
Is F8 E4 the same fault on KitchenAid dishwashers?
Functionally yes. KitchenAid and Whirlpool share the DTM platform. The diagnostic sequence is identical, but the wash motor part number is different. Look up the KitchenAid-specific motor part before ordering.

Related Whirlpool Dishwasher Error Codes

Code: F8Whirlpool Dishwasher F8 Error Code: Motor Communication FaultCode: E1 F1Whirlpool Dishwasher E1 F1 Error Code: Main Control Board Relay FaultCode: F4 E3Whirlpool Dishwasher F4 E3 Error Code: Thermal Fuse Fault

Same Fix on Other Brands

KitchenAid F8 E4:

Same Fix Works on These Brands

Whirlpool shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience F8 E4 Errors

This repair applies to most Whirlpool dishwashers with this error code. Common model numbers include:

WDT780SAEM, WDF550SAHZ, WDT730PAHZ, WDT750SAHZ, WDT970SAHZ, WDF518SAHM, WDT720PADE

Last verified for technical accuracy on March 14, 2026