My cabrio washer developed this problem after maybe 2-3 years. I get the overload error all the time - I could have one sock in there and it will give me the overload error. Apparently this is a pretty common problem but I don't know of any permanent fix. This is caused by corrosion on the shaft and the bearing the tub floats up on - which in their great wisdom they decided to make out of carbon steel (which rusts very easily), despite the fact that it is exposed to soap and water all the time (which will greatly accelerate any rust and prevent most conventional bearing/shaft solutions from working - like grease). It's not really stuck together like hard to get apart but I imagine any a pretty small amount of resistance could prevent it from floating when it is expecting the tub to float which triggers the oL error. I have taken it apart and removed the tub a few times already to clean the shaft and the bearing the tub floats on but it is getting less effective. The last time I did it I think I only got one load out of it before the condition came up again.
I have only used the HE detergent in this washer. It does sit a lot - I use it at most once a week sometimes less than that - and of course lately hardly at all because it doesn't work. Which might make the problem worse compared to someone who uses it every day. Is there any fix for this? Besides throwing a washer in the trash that has had all of 100 loads run through it? All I know is between this and the front-load that preceeded it, next time I'm going to get an old school machine that fills the tub with water.
The only thing I can think of is to replace the shaft and bearing (which might necessitate replacing the entire tub as it is one piece) in which case I might as well just throw it away and buy something else. I'm sure the parts would not be cheap for that.