Fisher & Paykel Built-In Dishwasher Code F40: water flow error

What F40 means

On Fisher & Paykel DW24U6I1 built-in dishwashers from the DW24U and DW60 platform, F40 reports a water flow error. The dishwasher is not seeing the flow of water it expects while filling or circulating, so it stops the cycle and displays F40. Owners notice the machine halting early, with the tub holding too little or no water. The code appears with a halted cycle.

Common causes of F40

Water supply restricted or turned down
Inlet hose bent or clogged
Flow measurement inside the machine not working

✓ One safe check you can try

1. Check that the supply valve under the sink is fully open. 2. Make sure the inlet hose is not kinked behind the dishwasher. 3. Switch the dishwasher off and on, and restart a short cycle. 4. If F40 comes back, leave it off and call us. Do not pull on the hoses.

! Why to stop there

Flow measurement parts sit inside the water path.
Guessing at parts can waste money; we confirm the code first.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other DishDrawer & Dishwasher codes

F4Fisher & Paykel DishDrawer Code F4: no temperature rise while heating F5Fisher & Paykel DishDrawer Code F5: lid motor current too high F6Fisher & Paykel DishDrawer Code F6: lid motors did not reach stall current F7Fisher & Paykel DishDrawer Code F7: no lid motor current detected F8Fisher & Paykel DishDrawer Code F8: ground leakage detected F9Fisher & Paykel DishDrawer Code F9: power supply or controller error F30Fisher & Paykel Built-In Dishwasher Code F30: flooding switch activated F50Fisher & Paykel Built-In Dishwasher Code F50: electronics error

F40F40 questions

Is F40 the same as A10?

They are related but not identical. A10 reports no water entering, with its listed causes being the tap, supply pressure and hoses. F40 reports a water flow error, so it is shown when the flow itself is wrong.

Can low pressure cause F40?

A weak supply can leave too little flow, so check that the valve is open and the kitchen tap runs strongly. If supply is normal, the flow parts inside the dishwasher need a technician.

What does the repair involve?

We check the supply, hoses and the flow path, find what is limiting it and quote a written price before work starts. Repairs come with our 30-day workmanship warranty.