I have an Ultimaker 2 Extended, and I'm getting ER02 about the bed temp sensor. I've swapped cables as advised by the troubleshooting site, but the error doesn't switch to the nozzle sensor. Am I correct that this seems like a board issue? I really want to get this printer fixed asap. It heats up just fine, but around 90 C the reading will suddenly jump up much faster to something in the mid or high nineties, then the error. I don't believe that the bed itself is heating too fast. I did manage to get one print after troubleshooting in an unproductive circle for some hours, but after that it went right back to erroring. Please, help?