If you have a washing machine with a screen (LCD) - electronic and the error F09 is lit or electromechanical Indesit (when there is no display) Lights flash "Spinning" and "Revolutions" (number of revolutions), or lights flash "Washing delayed" and "Extra rinse".
This is how error F09 looks on a washing machine without a screen, when the lights are on or flashing only:

Contents
What does this error code F09 mean?
This error indicates The error in the memory of the control unit
Indesit error signals
Does not respond to pressing, Does not turn on.
Checking with your own hands-solving
- Check the socket, is there voltage in it? Try another appliance to check if it's working.
- Unplug the appliance for 20 minutes, thereby resetting it.
Replacing and repairing
- Reset the settings in the washer-dryer.
- Check and Repair Contacts
- Repair or reprogram control module
Other errors of washing machines:
- Error code F07: water level sensor defective, after pumping water
- Error code F08: heating element defective