This MP 6503 has a code of sc541-02, and sc542-02. The history shows a similar issue about a year ago. The tech replaced the thermisters, and when that didn't fix it he replaced the thermostats and said that did it. I have a 7502 at another local that codes and I just clean the thermisters and it's all good. On this machine I found the thermostat holder broke on one end. I replaced the holder, the thermostats and thermisters. It still codes. When I check the roller temp in sp mode, it shows the end thermister at 26, which would be room temp and the center is 0, which means it's open. I assume at this point I am looking for some kind of pinch or break in the circuit. I had to drop a loaner and send it back to the shop. Anyone have similar issues or suggestions?
Bookmarks