OFF BALANCE WHILE SPINNING

You must put your clothes in evenly...and don't over full with clothes

balance sensor defective.
http://www.appliancepartspros.com/Appliance-Parts/lg-sensor-assembly-item-number-ap4440678.aspx .

There may be damage to the balance ring which is situated on top of the basket. This hollow ring is partially filled with fluid which will move to compensate for an unbalanced load. Normally this model would be able to handle up to 5 -6lbs of unbalanced load on one side without significant movement. If the fluid has leaked out it would have a hard time with a slight unbalance. Without some disassembly, it will be difficult to tell. A couple of quick things to look for would be: If the ring still has fluid, you might be able to hear a slight sloshing sound when you move the tub back and forth with your hand. If it has leaked you might see clear droplets that have a greasy feel between you fingers and do not evaporate like water would. That is if it has not been washed away during use.

It is possible that the dampers mounted to stabilise the drum on motion is defective. The suspension springs can be weak and aggravate the drum to aggitate out of balance.
So check from the underside for the dampers, replace if soft and test.

REPLACE YOUR SUSPENSION RODS. You can get them at a discount applicance parts store online for about $60. Our washer is about 8 years old and has been getting unbalanced on every load. I replaced the suspension rods tonight and and it solved the problem.

sounds like you have two problems, the burning smell is probably the pump,out of balance is usually due to worn aout suspension rods

Try a different spin cycle on another setting if it still doest work try removeing the clothes and changing it to a normal wash cycle. If no try unplugging it for a minute or 2 and then back in hopefully it resets and if still no movement on the unit at all you may have overloaded it causing the motor to wear prematuraly and burn up. This is very common with overloading.

old duets have nut on rear pulley that becomes loose. remove rear panel and tighten nut. check while spinning by hand if pop is felt. if it rotates smoothly then you may need new shocks on tub

Most likely, your pulley is coming off, my pulley mad that knocking sound for a year before the belt fell off and I had to address it. see the previous post on how to fix this issue.

lean washer back remove bottom cover have towels handy remove bottom cover on pump (if it has them) clean pump..if it doesn't best replace pump older pumps had spines that would strip out so pump would pump out the water