Product review (4 stars): I'm A (Vent) Fan
This part will resolve your problem if you have an Electrolux or Frigidaire dishwasher which is throwing a UF code that the vent fan is not working.  It also will address a U0 code where the washer won't start IF the issue is the fan, or you were getting UF for a few days but it now says U0 and won't start.  The part also is compatible with many Kenmore units, as they are/were made for Sears by Electrolux.

I used this part on my 8 year old Frigidaire PLD4555 when I started getting UF codes that quickly changed to U0.  The part is very simple to replace EXCEPT you do need to pull out the washer, as the vent fan is on the top.  It is a 2 minute job to do the actual replacement (a screw or two and un/replugging the connector) plus whatever time you need to pull out and push back the dishwasher.

It's much better than hundred or over $1000 for a new unit.

I think the price is a bit much.  There is no reason this is not a $40 part other than greed.  That said, the Amazon price is typically much better than at other places.