Dishwasher quit working, clean light flashing

After reading the manual that a flashing green light is caused by a heater circuit, I assumed that the cause was the heater element. I found PartSelect on the web, ordered the element and received it the following day. I watched the video on installation and replaced it within a half hour. Unfortunately, the clean light still flashed. I went back to PartSelect site, read other peoples comments and ordered a thermistor. The delivery took one day and the replacement less than a half hour. Again, the light flashed. I ordered the high temp thermostat, received it immediately, changed it out and still had the flashing clean light. From the Part Select site, I learned the hi-temp/heated dry combination reset after the wash cycle for the rinse cycle without the heated dry. Dishes come out clean. I'm afraid to order the controller for over $120.00 and have the same outcome. I wish I had invested in an ohm meter. I am very happy with the PartSelect web site. It is very informative, easy to locate the parts and very quick delivery times.