What this error means
The F6 error code on your Whirlpool dishwasher means the machine cannot fill with water — it has not received the expected amount of water within the set time and has stopped the cycle to prevent running dry.
The F6 error is a water inlet fault. At the start of each wash and rinse phase, the dishwasher opens its water inlet valve to allow a measured amount of water into the machine. The water level is monitored by the pressure switch or flow meter, and if the required level is not reached within the allotted time, the machine stops and displays F6. Running a dishwasher dry is dangerous — without water, the wash pump and heating element can overheat rapidly, causing serious internal damage. The most common causes of F6 are a closed or partially closed water supply tap, a kinked inlet hose, a blocked inlet filter mesh (a small screen inside the inlet connection at the back of the machine), low mains water pressure, or a faulty water inlet valve solenoid that is not opening correctly. In the vast majority of cases this is a simple fix requiring no tools.
Step-by-step
Symptoms to look for
- F6 displayed on the control panel
- Dishwasher not filling with water at the start of a cycle
- Machine starting then stopping very quickly without washing
- No sound of water entering the machine at the start of a programme
- Programme taking much longer than usual to begin
Diagnostic steps
Locate the water supply tap for the dishwasher — on most UK installations this is under the kitchen sink, on the cold supply pipe. Turn it fully anticlockwise to ensure it is completely open. Then run the kitchen cold tap at the sink to confirm the mains pressure feels normal. If the tap pressure is weak or absent, the issue is upstream of the dishwasher and your water provider should be contacted.
With the machine switched off and unplugged, pull it forward slightly to access the back. Follow the inlet hose along its full length from the supply tap to the back of the machine, checking for kinks, tight bends, or anywhere the hose is being pinched by the machine or cabinet. Straighten any kinks so the hose runs in a gentle curve.
Close the supply tap fully. Place a towel under the inlet hose connection at the back of the machine to catch residual water, then unscrew the inlet hose by turning it anticlockwise. Look into the threaded inlet port on the back of the machine — you will see a small plastic or metal mesh screen. Grip it gently with a pair of needle-nose pliers and pull it straight out. Rinse it thoroughly under the tap, using a toothbrush to remove limescale deposits. Refit it carefully, ensuring it sits flush and straight inside the port.
If the above steps do not resolve F6, the water inlet valve solenoid itself may be faulty. The inlet valve is the electrically operated valve inside the machine that physically opens when the control board sends the fill signal. You can listen for it at the start of a fill phase — you should hear a faint click as it opens. No click, or a click with no water flowing despite good mains pressure, points to a failed inlet valve.
On some Whirlpool dishwasher models a flow meter (rather than a traditional pressure switch) measures the volume of water entering the machine. A faulty flow meter can cause F6 even when the water supply and inlet valve are both functioning correctly — it misreports the fill level to the control board. An engineer with diagnostic equipment can confirm whether the flow meter is at fault.
When to call an engineer
- F6 persists after checking tap, hose, and inlet filter mesh
- Inlet valve clicks but water does not flow with confirmed normal mains pressure
- No click audible from inlet valve at the start of a cycle
- Flow meter confirmed as faulty on diagnostic testing
- Low mains water pressure confirmed — engineer can advise on solutions
Frequently asked questions
What does F6 mean on a Whirlpool dishwasher?
What is the most common cause of F6 on a Whirlpool dishwasher?
Can I fix F6 on a Whirlpool dishwasher myself?
Where is the inlet filter mesh on a Whirlpool dishwasher?
How do I reset F6 on a Whirlpool dishwasher?
🎯 What is most likely causing your Whirlpool F6 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 |
|---|---|---|
| Inlet valve | £10 - £20 | 🛒 Amazon UK → |
| Inlet valve | £10 - £20 | 🏷️ eBay 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.