Replaced the control board. I found out the fix by simply Googling the error code. Watching the short video of the repair convinced me that this was easy enough for me to do by myself. I took out the old control board before ordering the new one just to ensure that I was ordering the right one. (The part numbers didn't match up at all.) I needed my husband's assistance to pull the dryer away from the wall and to loosen a couple of the tight screws, but after that he let me have all of the fun. I did take pictures as I went along, just to be safe, and I reference them to ensure that I hadn't turned any of the wire connections around. It probably wasn't necessary, though, since with the exception of the red and black wires there's only one way to re-attach them.