1. Failed lid lock (top-load) or door-lock switch (front-load)
What it is: Whirlpool boards require a locked-lid / locked-door signal before allowing spin. When the lock switch wears the board reads 'door open' and aborts spin even though the lid is closed. Symptom: washer drains but never spins, sometimes flashes 'F5' / 'Sd' / 'dL'. The single most-common cause across Cabrio and Duet platforms.
Fix: Test lid/door lock for continuity in locked position, replace OEM lid-lock or door-lock assembly. Bench-test before closing.
Typical all-in: $215–$315 all-in
2. Worn drive belt or stripped drive coupler
What it is: Direct-drive top-load Whirlpool (WTW / pre-Cabrio platforms) use a plastic drive coupler that strips at year 5–10. Symptom: agitator moves weakly or not at all, no spin. Belt-drive top-loaders and Duet front-loaders use a drive belt that stretches and slips.
Fix: Replace OEM drive coupler (top-load direct-drive) or drive belt + pulley (Cabrio / Duet / WFW). Inspect the transmission for play while we're in there.
Typical all-in: $235–$365 all-in
3. Failed shifter / actuator (Cabrio & VMW top-load)
What it is: Cabrio and VMW (Vertical Modular Washer) platforms use a shift actuator under the tub to switch between agitate and spin. When the actuator fails the board still calls for spin but the basket never engages. Symptom: motor hums, basket doesn't turn. Common at year 4–7.
Fix: Replace OEM shift actuator (W10913953 family), run service-mode spin test to verify engagement.
Typical all-in: $245–$365 all-in
4. Clogged drain pump or drain line — unit aborts spin
What it is: Whirlpool firmware aborts spin if it doesn't see standing water clear in time — bearing protection. Symptom: long drain cycle, then no spin, sometimes 'F9 E1' or 'LF' code on Duet front-loaders.
Fix: Clear the drain pump filter (front-load — accessible at the lower-front access panel), or replace the OEM drain pump if impeller is damaged. Verify drain time under 2 minutes.
Typical all-in: $215–$315 all-in
5. Failed motor control unit (MCU) on Duet / WFW front-load
What it is: Duet and WFW front-loaders use a separate motor control board (MCU) that drives the motor through PWM. When the MCU fails, motor either doesn't run for spin or runs but throws an F-code. Common at year 6–10 on heavily-used units.
Fix: Test MCU outputs in service mode, replace OEM MCU. Less commonly, the main control board has failed and needs replacement.
Typical all-in: $345–$525 all-in