If you have a washing machine with a screen (LCD display) - electronic and the error F08 is displayed or electromechanical Indesit (when there is no display) the "Speed" (number of revolutions) light is flashing, or the "Quick wash" light is on
This is what error F08 looks like on a washing machine without a screen, when only the indicators are lit or flashing:

Content
What does this error code F08 mean?
This error indicates with almost 100 percent probability that the malfunction electric heater (TENA - tubular electric heating), since the network is closed with the control module.
Indesit error signals
The washing machine does not heat water., the wash does not finish, or the laundry is not washed in hot water.
We check it ourselves and decide
- The water supply filter may be clogged;
- We check the connection of the heating element and the temperature sensor;
- We check the water level sensor.
We replace and repair
- We repair the wiring from the heating element to the module
- Replacing the water level sensor (pressure switch)
- We are replacing the heating element;
- We replace or repair the programmer (control module)
Other washing machine errors:
- Error code F07: water level sensor is faulty after filling with water
- Error code F05: The washing machine drain is faulty.

I have an Indesit 105 washing machine. It starts washing, but when it reaches the drain and spin cycle, the drum stops, the indicator light flashes 8 times, the drain motor hums, and the program selection knob spins in a circle. All the pipes are clean, but the drain pump is hot.