F4E3 Serious Moderate DIY

Whirlpool Dishwasher F4E3 — Circulation Pump Communication Error

Whirlpool Dishwasher · Error code F4E3

What F4E3 Means

The control board cannot communicate with the variable-speed circulation (wash) pump motor. The dishwasher will not run a wash cycle.

Symptoms

  • F4E3 on display
  • No wash spray action
  • Cycle stops shortly after starting
  • Pump may hum briefly then stop

Common Causes

1
Loose or damaged wire harness between control and pump

Connector at the pump or board has backed out, or harness is pinched.

2
Failed circulation pump motor

The brushless DC pump motor's electronics have failed.

3
Failed control board

Less common — only after ruling out harness and pump.

How to Fix It

  1. Power off at the breaker.
  2. Pull the toe-kick and locate the harness running to the circulation pump (large round motor on the side of the sump).
  3. Unplug and reseat both ends of the harness. Look for melted or discolored connectors.
  4. If the harness is good, run the service diagnostic — pump should run smoothly. If it does not, replace the circulation pump/motor assembly.
  5. If pump tests good but F4E3 persists, replace the control board.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Whirlpool dishwasher circulation pump motor View on Amazon→

More Whirlpool Dishwasher Codes

E1 E1 — Fill / Water Supply Problem (legacy code) E4 E4 — Overfill / Water in Drip Tray F1E1 F1E1 — Stuck Relay on Control Board F1E2 F1E2 — Incompatible or Failed Control Board F2 F2 — Water leak detected F3E1 F3E1 — Thermistor/OWI Sensor Open

All Whirlpool codes → All dishwasher codes →

Verified against manufacturer documentation: applianceaid.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.