If you have a washing machine with a screen (LCD) - electronic and lit error F18 or electromechanical Indesit machine (when there is no display), the light "Spin" and "Quick Wash" or flashing light "Delayed Washing" and "Rinse"
This is what error F18 looks like on a washing machine without display, when only lights are on or flashing:

Contents
What does this error code mean?
The module of the washing machine is defective
Indesit error signals
The machine doesn't turn on, doesn't start
Checking with our own hands - solving
- Carefully glitch in the control processor of the washing machine and it hangs, try to unplug it for half an hour and plug it in again.
Replacing and repairing
- Washing machine brains (electronic module) replacement or repair
Other washing machine errors:
- Error code F15: The heating element with dryer is defective
- Error code F16: The drum of the washing machine is blocked