Hoped it was a fuse but didn't know if dishwasher had a fuse. Entered model number into Appliance Parts Pro website and was presented with their wonderfully laid out parts explosion and sure enough, there was a fuse.
Clicked on the fuse and OMG there was a video showing how to replace it. Without the video I probably would not have done it myself.
Ordered the part, it arrived two days after I ordered it and replaced it just as was shown in the video.