Fridge issue - how long to thaw?

[spence]

Our LG fridge has not been cooling well lately and this morning had the FF error which means the evaporator fan isn't working...reading online I see they're prone to icing up.

Let it thaw for a while and it seemed to be running fine then a few hours later crapped out with the FF error. I assume this is because it thawed just enough to run then got cold and froze up again.

So I've had it open all day with the food removed in the hopes that it's not a bad motor/board and will resume working. I tried taking it apart enough to just get at the fan but couldn't figure out how the shelf unit is removed and didn't want to damage it.

All that being said, how long do you think before something like that would fully defrost?

thanks,

-spence