This error code indicates a problem with control: for some reason, it has stopped getting signals from the control panel. To clear the error, it is advisable to reset the washer (use Hard Reset). Do the following :
- Switch off or disconnect your washer from the mains and wait for 30 seconds.
- Switch on or plug the washer back in.
- Push the Pause/Cancel/Stop button twice and see if the PF indication has gone.
- Run a cycle. To do so, select a short one, press and hold Start until the cycle begins.
Most likely, the electronic control board has failed. This can be due to a glitch or power surge. You can correct it by switching off/disconnecting the washer for about 5 minutes.
If the problem persists after that, most likely, the control board is faulty and you need to replace it.