The F6 error on your Indesit Dishwasher means the machine has detected a water flow or water heating problem, usually linked to the flow meter, heating element, or NTC temperature sensor. Cutting the power for a few minutes and checking the water supply often clears it, but if it keeps coming back the heating circuit likely needs testing.

Error code F6
Meaning Water heating or water flow fault detected during the wash cycle
Severity Medium — the dishwasher may still run but won’t heat or fill properly
Time to fix 15–45 minutes
Tools needed Multimeter, screwdriver, torch

What the F6 error means

The F6 fault code appears when the dishwasher’s control board senses that water isn’t heating correctly, or that the flow sensor isn’t reading water movement as expected. This can happen partway through a cycle or right at the start, and often causes the machine to pause or stop entirely.

It’s similar in nature to flow and heating faults seen across the Indesit range, including issues covered in guides like Indesit Washing F04 Error Code: Causes and Fixes and Indesit Washing F05 Error Code: Causes and Fixes, where sensor and flow problems are common triggers.

Common causes

  • Faulty or worn heating element that no longer heats water to the required temperature
  • Failed NTC temperature sensor sending incorrect readings to the control board
  • Blocked or faulty flow meter preventing accurate water flow detection
  • Limescale or debris build-up around the heater and sensor housing
  • Loose or corroded wiring connections at the heating element or sensor
  • Low incoming water pressure or a partially blocked inlet valve

How to fix the F6 error

  1. Power cycle the dishwasher: Turn off at the wall, wait 5 minutes, then switch back on and start a new cycle to see if the fault clears.
  2. Check the water supply: Make sure the inlet valve is fully open and the hose isn’t kinked, as low pressure can trigger flow-related faults.
  3. Inspect the heating element: Locate it at the base of the tub and check for visible damage, scale build-up, or looseness in its wiring.
  4. Test the NTC sensor: Using a multimeter, check the sensor’s resistance against the manufacturer’s spec; replace it if readings are out of range.
  5. Clean or replace the flow meter: Remove it from the water inlet line and clear any debris, or fit a new one if it’s damaged.
  6. Call an engineer: If the fault persists after these checks, the control board itself may need diagnosing and should be handled by a qualified technician.

FAQ

Can I keep using the dishwasher with an F6 error showing?
It’s best not to. The machine may not heat water properly, leaving dishes poorly cleaned or not sanitised.

Is the F6 fault expensive to fix?
It depends on the cause. A blocked flow meter is a cheap fix, but a replacement heating element or control board will cost more and may need a professional.

Does an F6 error mean the dishwasher is broken for good?
No, in most cases it’s a component fault or blockage that can be repaired rather than a sign the whole appliance needs replacing.