Whirlpool · Washing Machine
Whirlpool Washing Machine F08 Error Code
Wash water not heating properly
What this error means
F08 means the washer could not raise water temperature as expected—on Duet models the tub must pass 86°F within the first 40 minutes of a heated cycle. The heater circuit or element is not delivering heat the control board can verify.
How F08 is detected
Whirlpool washing machine models lock the door or lid before energizing fill, heat, or high-speed spin. F08 means the latch switch never sent a "locked" signal to the main control, or the lock motor did not complete its travel. On Whirlpool WFW6620HC, Whirlpool WFW560CHW, and similar variants, clothing caught in the gasket, a misaligned strike, or a failed latch assembly are the most common mechanical causes—not the board itself.
Inspect the door gasket perimeter and strike alignment before replacing the latch. Open-circuit heating element inside the stainless tub is reported frequently on this code. After correcting mechanical issues, confirm the home hot water faucet is on and delivers warm water at the inlet hoses. If the latch clicks but F08 persists, the door lock switch or wiring harness to the control board likely needs testing with a multimeter.
Do not force the door open during an active cycle; wait for the lock to release when the board de-energizes the lock motor—usually two to three minutes after canceling power on most Whirlpool units.
Common causes
- Open-circuit heating element inside the stainless tub
- Loose wire at the heater terminal block behind the rear panel
- No hot water supply to the hot inlet valve
- Heater relay on the main control board not energizing
Step-by-step fixes
- 1Confirm the home hot water faucet is on and delivers warm water at the inlet hoses
- 2Unplug the washer and access the rear panel to inspect heater wire connections
- 3Measure heater resistance with a multimeter—it should not read open/infinite
- 4Run a Sanitize or Heavy Duty cycle and listen for the heater engaging after fill completes
When to call a technician
Replace the tub heater or control board through service if F08 returns after confirming good wiring and hot water supply.
Affected models
- Whirlpool WFW6620HC
- Whirlpool WFW560CHW
- Whirlpool WFW9620HW
Prevention & maintenance
- Wipe the door gasket weekly and avoid overloading items against the seal—F08 often starts as a slow leak or latch misalignment.
- Record when F08 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 F08; Whirlpool uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F08; reversed plugs on pumps and valves cause immediate repeat faults.