Product review (5 stars): Simple sensor fixed my LG washer problems + instructions
Replacing this sensor fixed my LG front load washer.  I tried to wash a heavy load and got the dreaded LE error.  This has happened before, and before it only took removing the drenched clothing, draining the tub, waiting awhile, and it started working again.  Not so lucky this time.  The LE error went away, but the tub would only turn in one direction a couple of inches before stopping suddenly.  It didn't even attempt to turn the other direction.  Then, you could hear the motor begin to whine.

The fix was simple; there are instructional videos online.  You'll need a ratcheting wrench, metric sockets, and a philips head screwdriver.

Instructions:
- *Unplug the washer*.
- Open up the back panel, crack the center bolt and remove it by putting the wrench on it, spin the rotor to the right, and then smack the wrench to the left with your hand.
- Wiggle the rotor to get it off.  (It's held on by big magnets so it takes a little effort)
- Remove the two power connectors from the coil.  You may need to unscrew a bracket holding one of the connector cords. (Instructions say remove the ground, but didn't seem necessary)
- Remove the 6-8 bolts holding the coil on, and remove the coil.
- Unsnap the sensor to remove, and snap the new one back on.
- Put the coil back on and screw in the bolts.
- Plug in the connectors.
- Put the rotor back on, put some thread lock on the center bolt, and screw it back in.
- Once tight, and with the wrench still on the bolt, spin the rotor to the left and hit the wrench to the right to ensure it's completely tight.
- Put the back panel back on.
- Plug in.
- Voila.

If I had the new sensor when I took this apart, then the job may have taken about 1/2 to 1 hour total.  Someone said something about marking the rotor's position before taking it off.  I'm not sure what you're marking, or what issue this could cause, but I didn't do it and the rotor went right back on.  Maybe I got lucky...?

There's no real reason to call a fix it person.  I heard it costs $80 just to get the fix-it guy to come take a look, much less fix the thing.  This part cost me $16.50 shipped and about 1/2 to 1 hour of easy labor.  It took exactly 7 days to ship to Michigan from this seller.  The only issue I had was that the tracking number never worked and I wasn't sure exactly when I'd get the part, but was pleasantly surprised that it only took a week.  If I could have found one at a local shop, I'd have gone that route.  One week without a washer when you're already out of laundry sucks!