What this error means
The F8 error code on your Whirlpool dishwasher means the anti-flood system has activated — a float switch in the base of the machine has detected water in the drip tray, indicating a leak somewhere inside the dishwasher.
The F8 error is triggered by the anti-flood protection system built into Whirlpool dishwashers. A float switch sits in a plastic drip tray in the base of the machine. Under normal conditions this tray is dry. If water leaks from any internal component — a door seal, a spray arm connection, a hose fitting, the pump housing, or the wash tub itself — it drips into the base tray. When enough water accumulates, the float rises, triggers the switch, and the machine immediately stops and displays F8 to prevent your kitchen from flooding. This is an important safety feature and should never be bypassed or ignored. Common sources of the leak include a damaged or perished door seal (gasket), a cracked or split internal water hose, a loose hose clip, a leaking wash pump seal, overfilling caused by a faulty inlet valve, or excessive sudsing from incorrect detergent use causing water to overflow internal channels. The base tray must be drained before the error will reset.
Step-by-step
Symptoms to look for
- F8 displayed on the control panel
- Dishwasher stopping suddenly mid-cycle
- Water visible on the kitchen floor around or under the machine
- Machine door locked and will not open
- Wet or damp base tray when machine is tilted forward
Diagnostic steps
Turn the water supply tap off (under the sink on the supply pipe) and unplug the dishwasher. If you cannot find an isolation tap, turn off the mains stopcock. Do not touch the machine again until the power is confirmed as off.
With a helper, carefully slide the dishwasher out from under the worktop. The inlet hose, drain hose, and power cable need enough slack to allow the machine to come forward — pull slowly and check that nothing is pulling tight. Once the machine is clear, tilt it gently to one side (towards the wall, away from your kitchen) to drain the water from the base tray. Have towels ready.
With the machine tilted and the water drained, shine a torch under and around the machine to look for wet patches, drip trails, or residue that indicates where the water originated. The most common leak sources on Whirlpool dishwashers are: the door seal (look for a torn, flattened, or displaced rubber gasket around the door aperture); the inlet or drain hose connections at the back (look for drips or white limescale streaks at the connection points); the wash pump area at the base of the machine (look for drips from the pump housing or its hose connections); or the door latch area (excessive door movement can cause the door seal to fail prematurely).
If the machine filled with foam rather than water, excessive sudsing may be the cause of F8. This happens when standard washing-up liquid is accidentally used instead of dishwasher detergent tablets or powder, or when far too much detergent is used. The foam overflows internal channels and drips into the base tray, triggering F8.
A torn door seal can sometimes be temporarily pressed back into its channel, but a perished or torn seal needs replacing. Hose connections can often be tightened by hand or with a screwdriver if a clip has slipped. If the leak source is internal (pump seal, tub crack, or internal hose) and not easily accessible, book an engineer.
After the repair, reconnect the water supply and plug the machine back in. Run a short rinse cycle and watch the machine closely throughout — check around the door seal, underneath the machine, and at the back hose connections for any signs of dripping. Only push the machine back under the worktop once you are confident the leak has been fully resolved.
When to call an engineer
- Leak source cannot be identified after inspecting door seal and hose connections
- Water is coming from the wash pump seal or an internal hose
- F8 returns immediately after draining tray and restarting — indicating an ongoing active leak
- Crack found in the tub or wash pump housing
- Water appears to have reached electrical components in the base
Frequently asked questions
What does F8 mean on a Whirlpool dishwasher?
Is F8 on a Whirlpool dishwasher dangerous?
How do I reset F8 on a Whirlpool dishwasher?
Can I fix F8 on a Whirlpool dishwasher myself?
What causes the F8 anti-flood warning on a Whirlpool dishwasher?
🎯 What is most likely causing your Whirlpool F8 error?
⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.
Parts you may need
Enter your model number to filter results to your exact machine
Usually found on a label inside the door frame or on the back panel of the machine.
| Part | Approx. UK Cost | Find it |
|---|---|---|
| Door Seal | £15 - £25 | 🛒 Amazon UK → |
| Door Seal | £15 - £25 | 🏷️ eBay UK → |
| Float switch | £15 - £25 | 🛒 Amazon UK → |
ℹ️ Prices are approximate. Always check the part number matches your model before ordering. Not sure of your model number? Find out how to locate it here.