I have an LG washing machine. As i turn on the Machine and start a load it runs for a short time then turns off. I noticed that one time it turned off the code "PF" came on the screen for a moment the

SOURCE: LE error

try using a-fresh its should help you out.

SOURCE: Drum will not spin

I unplugged the machine for 1 hour and the computer reset, and it is working fine

SOURCE: Lg Tromm washing machine drum will not turn

the Hall sensor (part number 6501KW2001A) has failed. The hall sensor is rather easy to replace, and is covered by a seven year part warranty. Take the back cover off. Take the big nut off and remove the motor rotor. Remove the bolts holding the motor windings. Remove the electric plug on the sensor and unclip it from the motor winding. Snap new sensor on and reassemble. Usually takes under a half hour. On a difficulty scale of 1 - 10, it might rate a 4. This should be a Fix-Ya for your machine, and at basically no cost!
In the US, find a service provider using your zip code at http://us.lgservice.com/index_b2c.jsp or call LG at 800-243-0000

SOURCE: dE code on WM0642HW TROMM washing machine

HI, this is a Door Open Error.

Possible Causes are..-

* Door not all the way closed
* Loose electrical connections at door switch and pwb assembly(Control Board)
* Door switch assembly is out of order(Miss aligned)
* Gasket on door may be creased in

Most common issue here will be a defective door lock switch. check all causes before replacing the switch.

SOURCE: LG model WM2277HW front load washing machine,

The 'LE' error message indicates the control board has detected that the motor is either not turning, or has locked up for some reason. Monitoring the motor is the job of the hall effect sensor board which constantly determines the direction and speed of the motor and feeds that information back to the control board. If there is a problem between what the motor should be doing and what the hall effect sensor says the motor is doing, the 'LE' will be displayed and the cycle will be stopped.
1) in my experience, sometimes this proves to be intermitent, and upon unplugging and waiting for 5 minutes does not seem to resurface again...
2)Motor lock can be caused by several things from a loose connector, to a bad motor, or even the hall effect sensor failing or dislodging from it's mount.
this could prove to be very challenging to somebody who does not know what they are working with, i suggest if the problem is not intermitent, call a tech.. hope this helps.