Product review (5 stars): Fixed My Frigidaire Gallery Error Code 57!
This fixed out Frigidaire Gallery series Model # GLTF2940FS1!  The problem we incurred was that somewhere in the middle of a load of wash it stopped working and we were left with soaking wet clothes.  The timer continued to the end of the cycle and we never noticed until we went to dry the clothes.  At that point we tried the drain/spin cycle which did not work.  We then tried all the cycles - none worked.  There was power, the lights would come on and with each cycle the appropriate time appeared but  it wouldn't fill with water or spin or anything else.  The timer would count down, but with no other actions.  Searches on line helped us to determine that we had an error code 57 which drew us to this control board which goes in the back behind the motor or the main control board which goes in the front behind the display.  We felt we had  a 50/50 shot choosing.  We concluded that because everything lit up and each cycle would show the appropriate time and all the spin cycles would light up when we changed them as would the water temp lights that the main control board was likely not our problem (so we hoped!).  We went with this part, installed it, plugged it back in and gave it a try and it worked!  Hooray!  It is finishing up a load now as I write this.