The F9 error on your Indesit Dishwasher means the machine has detected water in the base tray (leak protection system has been triggered). Turn off the water supply and power, then check underneath the appliance before restarting.

Error code F9
Meaning Leak or excess water detected in the base pan by the aquastop safety float switch
Severity High — the dishwasher will not run a cycle until the water is cleared and the fault is resolved
Time to fix 15–45 minutes
Tools needed Towels, torch, adjustable pliers, spare hose clips (if needed)

What the F9 error means

Indesit dishwashers have a small float switch sitting in the base of the machine. If water collects there — from a leak, overfill, or condensation build-up — the float rises and trips the F9 warning to stop the appliance from running and causing further water damage.

This code doesn’t point to one single part; it’s a safety response. The actual cause could be anywhere in the water system, from a loose hose to a cracked tub seal, so some checking is needed to find the source.

Common causes

  • A loose or split water inlet or drain hose connection
  • A leaking door seal (gasket) letting water escape during the wash
  • Too much detergent or the wrong type causing over-foaming and overflow
  • A cracked or damaged spray arm, sump, or tub component
  • A faulty water inlet valve that lets water in when it shouldn’t
  • The float switch itself sticking or malfunctioning even without a real leak

How to fix the F9 error

  1. Cut the power and water supply — Switch off the dishwasher at the plug and turn off the water tap feeding the machine before you do anything else.
  2. Pull the dishwasher out and check underneath — Use a torch to look for standing water in the base tray or on the floor beneath the unit.
  3. Inspect hoses and connections — Check the inlet hose, drain hose, and their connections at both the machine and the wall fittings for looseness, kinks, or cracks. Tighten or replace as needed.
  4. Check the door seal — Run your finger around the rubber gasket looking for tears, food debris, or gaps that could let water leak out during the cycle.
  5. Remove excess water and dry the base — Soak up any water with towels, dry the float switch area, and make sure it moves freely up and down.
  6. Restore power and run a short test cycle — Plug the machine back in, turn the water on, and run a rinse-only cycle while watching for new leaks. If F9 returns immediately, the inlet valve or tub may need professional inspection.

FAQ

Can I keep using the dishwasher with an F9 error showing?
No. The machine is designed to stop running once F9 appears, and continuing to use it risks water damage to your kitchen floor and cabinets.

Will drying out the base tray clear the error on its own?
Sometimes yes, if the water was minor condensation rather than an active leak. Dry it thoroughly, check the float switch moves freely, then try a test cycle to confirm.

Is F9 similar to leak codes on Indesit washing machines?
It’s a related concept but not the same fault. If you’re dealing with an Indesit washing machine instead, see our guides on the Indesit Washing F02 Error Code, Indesit Washing F03 Error Code, or Indesit Washing F05 Error Code for their specific causes.