Had a short and now it only reads Def on both heat readers and I’ve changed the thermostats and the heat block. I’m not sure what is wrong with it. If the board went bad went bad what would be a good upgrade board for it.
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Had the same issue. It worked until randomly one day the heat bed didn’t turn on. I updated the firmware and it seems to have fixed the issue of the bed temp not being read. But the bed temp that’s displayed pops around from 5 to 21 degrees C. So most likely the thermistor is broken. Update your firmware and see if that’s the issue for you. Here’s a link to the firmware: https://drive.google.com/drive/folders/0BxyFI3iDaicLemUwcHZkbGtRbkU
