Whirlpool · Washing Machine
Whirlpool Washing Machine F25 Error Code
Motor tachometer signal missing
What this error means
F25 means the motor tachometer on the direct-drive stator is not reporting drum speed to the main control. Without tach feedback the washer cannot modulate spin acceleration and stops the cycle as a safety precaution.
How F25 is detected
When F25 appears on a Whirlpool washing machine, the control board has confirmed that water did not leave the machine within the programmed drain window. On Whirlpool WFW9150FW, Whirlpool WFW8620HC, 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 F25 calls are resolved without parts: unplug the washer and verify the ms2 motor harness is fully seated at the control board. 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 F25 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
- Loose connector at MS2.1 on the main control board
- Broken tachometer wire in the motor harness
- Failed tachometer coil on the motor stator
- Motor control unit not forwarding speed data to the CCU
Step-by-step fixes
- 1Unplug the washer and verify the MS2 motor harness is fully seated at the control board
- 2Inspect the motor rear harness for pin damage where it enters the stator
- 3Measure tachometer resistance—Duet service docs expect roughly 115Ω
- 4Run a spin-only cycle after reset; a brief hum with no drum rotation confirms motor or tach failure
When to call a technician
Motor or tachometer replacement requires rear-panel disassembly—schedule service if resistance is out of range.
Affected models
- Whirlpool WFW9150FW
- Whirlpool WFW8620HC
- Whirlpool WFW9620HW
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use washing machines to prevent F25 from lint and food debris buildup.
- Record when F25 appears in the cycle and whether it clears after a 60-second power reset on your Whirlpool washing machine—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for F25; Whirlpool uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F25; reversed plugs on pumps and valves cause immediate repeat faults.