What does the Indesit F11 error code mean?
F11 on Indesit dishwashers relates to the water level/pressure switch system. The control board is receiving an incorrect signal from the pressure switch, meaning it either cannot confirm that the machine has filled to the correct level, or it believes water is still present when the tub is empty.
🔍 Symptoms
- Machine fills but then stops without washing
- Machine drains but immediately triggers another drain cycle
- Cycle progress is unpredictable — sometimes works, sometimes does not
- Error appears early in the cycle during the fill phase
- Machine overfills occasionally
How to fix the Indesit F11 error code
- Access the pressure switch — on most Indesit dishwashers it is a small round plastic component connected to a thin rubber hose in the lower section of the machine.
- Check the hose connecting the pressure switch to the sump for any blockages, kinks, or holes. Blow through the hose to check it is clear.
- Check the electrical connections to the pressure switch for corrosion or looseness.
- Clean the hose with warm water — detergent residue can block the pressure tube and cause false readings.
- If the hose is clear and connections are solid, test the pressure switch itself — or simply replace it as it is inexpensive.
Frequently Asked Questions (FAQ)
Q: What does a pressure switch do in a dishwasher?
A: It monitors the water level in the machine by measuring air pressure in a connected tube. When water rises to the correct level, it compresses the air in the tube, and the pressure switch sends a signal to the control board to stop filling.
Q: Can limescale block the pressure switch tube in a dishwasher?
A: Yes, particularly in hard-water areas. The narrow bore of the tube means even a small limescale deposit can restrict or block it completely, causing inaccurate water level readings.
Q: Is F11 on an Indesit dishwasher dangerous?
A: It can lead to overfilling if the switch fails in the wrong position, which could trigger a secondary flood protection response. Repair it promptly.
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