What to check first
Can I keep using it?
Do not keep using the appliance while this warning is active.
Do not keep running the appliance when water is visible, a leak warning is active, or water could reach wiring or controls.
- Safe next step
- Stop the cycle if safe, turn off water when appropriate, protect the floor, and avoid repeated resets until the leak source is understood.
- Stop when
- Water is near wiring, cabinetry is getting wet, the leak returns, or the source is not safely visible.
Do not keep using the appliance if the code points to voltage, wiring, control power, burning smell, smoke, or a possible miswired supply.
- Safe next step
- Use only safe owner-level power checks, then involve a qualified technician or electrician when the source points to wiring or supply voltage.
- Stop when
- Breakers trip, lights dim, the appliance smells hot, wiring may be miswired, or the warning returns after a safe reset.
Safety boundaries
Safe first
- Match the exact brand, appliance type, and displayed code first.
- Use the model manual as the final authority for access steps.
- Disconnect power before any service-access step.
Do not do this
- Do not keep running the appliance while this code is active.
- Do not bypass locks, float switches, leak sensors, or other safety systems.
Common causes include
- The dishwasher control has detected the manual's unspecified water-flow error
- A persistent flow condition that requires Fisher & Paykel Customer Care rather than an inferred component diagnosis
Basic checks
- Record whether F40 appeared while the dishwasher was filling, washing, or draining; the reviewed guide does not identify a specific failed part.
- Inspect the floor, cabinet edge, and exposed hoses from a dry position without moving the dishwasher; if water is visible, keep it off and close the tap when safely reachable.
- Confirm that the household water supply is normal and that an exposed hose is not visibly crushed, but do not disconnect plumbing or open panels.
- Photograph the complete display and model label for Customer Care if the code returns.
Reset or retry steps
- Switch the dishwasher off and on once only when the appliance, floor, plug, outlet, cabinet, and visible connections are dry and there is no abnormal heat or odor.
- Stop further retries and leave the dishwasher off if F40 returns or water movement remains abnormal.
When to call a technician
- Contact Fisher & Paykel Customer Care if F40 persists after the single documented off/on check.
- Close the water tap and arrange prompt help if water appears, a hose is damaged, or moisture approaches an electrical connection.
Before approving a paid visit, check warranty status and reviewquestions to ask before repair.
FAQ
What does Fisher & Paykel Dishwasher code F40 usually mean?
Guide 591900A documents F40 on these DW60U dishwashers as a flow error. Model context matters: User guide 591900A gives only the label 'water flow error' for F40. This page therefore avoids assigning a specific component or repair.
Can I keep using the dishwasher with code F40?
Do not keep using the appliance until the visible issue has been checked and the relevant safety warnings have been addressed. F40 is not proof that a particular pump, valve, or sensor has failed; internal diagnosis requires qualified service.
When should I call a technician for Fisher & Paykel F40?
Contact Fisher & Paykel Customer Care if F40 persists after the single documented off/on check. A qualified technician may check Water-flow path and Control system against the model's service information before treating any part as failed.