Problem with LG washing machine Model number wm1480fhd. The machine drum reluctantly turns and in about a few minutes it displays error code LE (flashing).

LG, the electronics and appliances conglomerate, manufactures a variety of high-efficiency washing machines. Whether you have a front- or top-loading model, your LG washer is equipped with an error-monitoring system. When the LE code appears in your display, it indicates a problem with the motor. The problem can be related to several different issues. In order to clear the error, determine which issue is at hand.
New Installation The LE error code may appear in an LG washer's display if installation issues exist. It indicates a miscommunication between the wash motor and the control panel. In most cases, you can simply reset the washer to solve the problem. Unplug your washer before pressing and holding the Start/Pause button for approximately five seconds. Plug it back in and set the washer to a rinse-spin cycle to see if the code has cleared. If the code reappears in the display, contact LG at the phone number in your owner's manual for assistance.
Thermal Overload Protection Your washer may display the LE code if the thermal overload protection circuit in the motor has been tripped. The feature is designed to prevent the motor from overheating and causing permanent damage to the washer. To clear the error code, the motor must cool down. Allow the washer to sit for approximately half an hour before restarting the cycle. If the code reappears, the motor may have an issue that requires a service call. Unplug your washer and contact LG.
Excessive Suds If your washer detects excessive soap suds in the drum, the LE error code can appear. Typically, excessive sudsing occurs when you use too much high-efficiency detergent or a detergent that's not specifically high-efficiency detergent. Always follow the guidelines in your owner's manual and on the detergent label to determine what type of detergent, and how much, to use. To get rid of soap suds in the drum and clear the code, unplug your washer and let it sit for a half hour so the suds can dissolve. Plug the washing machine back in and turn it on, hitting the Spin Speed button and selecting "No Spin." Press the Start/Pause button to turn on a drain only cycle. When the cycle is completed, remove the load from the tub. Start a rinse-spin cycle to clear away any residue. You may need to repeat the cycle to remove all of the suds.
Load Issues The LE error code can appear in an LG washer's display due to certain load conditions. If you are washing a large load, don't choose a gentle cycle like Delicates, Hand Wash, Perm Press or Wool/Silk. Reserve them for smaller loads. To reset the washer, unplug it and press the Start/Pause button for five seconds before plugging it back in. The LE code can indicate that the washer has been overloaded; large loads and bulky items can strain the motor. Remove a few items from the washer to reduce the load size and restart the cycle. If the code appears again, let the washer sit for a half-hour so the motor has time to cool down before you restart the cycle.

LE errors mean the motor is locking up and cannot turn the drum. If the drum turns freely by hand then it could be https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Washing-Machine/406-200-684484-/LG-LE-MOTOR-ERROR-Motor-Stator-overheat-or-connection-error-WM2016CW
If that is not the problem then the motor needs replaced.

Here are few troubleshooting tips that i have found. If you acquire further assistance please let me know...

Is this a new installation?
In new installations, this error can sometimes present because of a miscommunication between the control panel and the wash motor. In this instance, the washer simply needs to be reset.
Step 1: Unplug the washing machine.
Step 2: While the washer remains unplugged, press and hold the [Start/Pause] button on the front panel for 5 seconds.
Step 3: Plug the unit back in, and run a rinse and spin cycle to test if the LE code is cleared.
Are there soap suds visible in the drum?
Over-sudsing is the main cause of LE error codes. Using non-HE (high efficiency) detergents or too much detergent will cause stress on the motor. In addition, detergent residue can also cause leaking and odor. Follow these steps to resolved an LE error code caused by over-sudsing.
Step 1: Unplug the washer and allow the unit to sit for 30 minutes to give the suds time to dissolve.
Step 2: Plug the washer back in and press [Power] to turn on the washer.
Step 3: Do not choose a washing cycle. Press the [Spin Speed] key until "No Spin" is selected.
Step 4: Press [Start/Pause] to begin a drain only cycle.
Step 5: After the drain only cycle has completed, remove the clothing items from the machine. Turn the power back on and select [Rinse and Spin] and then press [Start/Pause]. This will remove excess soap suds and light residue from the drum. Repeat this step until no visible suds are in the drum of the washer.

Has a large load size been used with a gentle wash setting?
Gentle wash cycles such as Perm Press, Delicates, Hand Wash, and Wool/Silk should only be used for smaller loads. Because the cycles are more gentle while tumbling and spinning, too many items in the drum can register as an issue with the motor. In this instance reset the unit and run a test rinse and spin cycle.

Has the washer been overloaded?
Single bulky items or large loads can add extra weight to the drum and place stress on the motor. Remove some of the clothing and restart. If the issue is still present after a few items have been removed, unplug the washer for 30 minutes to allow the motor to cool and then restart the cycle.

First try unplugging the machine for a few minutes and then retry a cycle. If you still get the LE error:

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 (in the US). 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

Note: you do not list your model number, so the part number for your Hall sensor may be different than posted above. Always confirm part number via looking up from your specific model number before ordering any parts.

LE is a locked motor error code.
It is usually associated with a loose motor connector wire or a defective Hall Sensor.

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

Usually it is the stator at fault with an LE error. I would make sure the cable between the stators windings and hall sensor are ok back to the main control board also give the wires a good tug sometimes the copper breaks inside the wiring insulation at the white connection blocks. Check to make sure theres nothing got trapped inbetween the drum and tub this can lock the drum up and give the fault. After checking all the above i would think it would either be a faulty stator or the main control board has failed. Hope this helps.

lg washing machine shows an error everytime i turn it on error such as pe

This info is right out of the LG Service Manual.. Hope this helps..

Unplug the machine and spun the drum few times by hand, wait 10-15 min. and plug it back. Good luck!