Answer Hello Dean. Check for 12vdc to fan between red and brown wires. Check for variant voltage (depending on high or low speed) between yellow and brown. If it checks ok then replace the Evaporator fan. If error code still exists then replace main control board 5303918514. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Friday, July 24, 2015