F40 — Water Flow Error
F40 means a water-flow error — the dishwasher is not getting the expected fill.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- support.fisherpaykel.com ↗
How to fix it
- Confirm the supply tap is open and clean the inlet filter.
- If F40 persists with good supply, the inlet valve or flow meter may need service.
Why it happens
Typical signs: Not filling properly · F40 shown
- Restricted fill Tap off or a blocked inlet filter.
- Low water pressure Insufficient incoming pressure.
- Flow-meter fault The flow sensor mis-reads.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- Fisher & Paykel Dishwasher Inlet Valve Common replacementAmazon →
More Fisher & Paykel dishwasher codes
Frequently asked questions
What does the F40 code mean on a Fisher & Paykel dishwasher?
F40 means a water-flow error — the dishwasher is not getting the expected fill.
What causes the F40 code on a Fisher & Paykel dishwasher?
Restricted fill: Tap off or a blocked inlet filter. Low water pressure: Insufficient incoming pressure. Flow-meter fault: The flow sensor mis-reads.
Is it safe to keep using a Fisher & Paykel dishwasher with a F40 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix F40 on a Fisher & Paykel dishwasher?
Confirm the supply tap is open and clean the inlet filter. If F40 persists with good supply, the inlet valve or flow meter may need service.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: support.fisherpaykel.com.