Kenmore · Dishwasher
Kenmore Dishwasher F4 Error Code
Wash motor not running
What this error means
F4 means the main wash motor did not start or did not reach expected speed. Spray arms will not rotate and dishes stay dirty after the wash phase times out.
How F4 is detected
When F4 appears on a Kenmore dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On Kenmore 665.13223K901, Kenmore 665.17789K801, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most F4 calls are resolved without parts: disconnect power and remove the lower spray arm and filter cover. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If F4 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Glass shard or seed lodged in the wash impeller
- Failed wash motor capacitor on single-phase motors
- Loose harness at the motor under the tub
- Seized motor bearings from hard water scale
Step-by-step fixes
- 1Disconnect power and remove the lower spray arm and filter cover
- 2Spin the impeller by hand—it should turn freely
- 3Reseat the two-wire or three-wire motor harness at the pump body
- 4Listen for motor hum during wash—silence with F4 means replace the motor
When to call a technician
Motor winding open or seized bearings require wash pump motor replacement.
Affected models
- Kenmore 665.13223K901
- Kenmore 665.17789K801
- Kenmore 665.14703N510
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent F4 from lint and food debris buildup.
- Record when F4 appears in the cycle and whether it clears after a 60-second power reset on your Kenmore dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for F4; Kenmore uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F4; reversed plugs on pumps and valves cause immediate repeat faults.