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Halp! Max v2 won't heat, shows "DEF" for temp
Posted: Mon Jan 20, 2020 1:39 pm
by benjaminhill
I just cleaned old glue off the print bed, but I thought I had been gentle. Now when I start it up it shows:
NOZ: def . BED: def
Error:Printer set into dry run mode until restart!
FW Version: 0.92.2
Automatic Heater Shutdown in Xm XX
https://photos.app.goo.gl/Vs4z3mJSZnved31WA
Anything I can do to diagnose what is up?
Some other threads mentioned it might be a blown mofset, or a misbehaving wire... not sure how to tell.
Re: Halp! Max v2 won't heat, shows "DEF" for temp
Posted: Tue Jan 21, 2020 8:36 am
by geneb
Check to make sure you didn't accidentally damage the thermistor on the bed. That would cause the "def" reading. Note that either one of the thermistors in the nozzle or the bed going bad will cause /both/ displays to show "def".
g.
Re: Halp! Max v2 won't heat, shows "DEF" for temp
Posted: Fri Mar 27, 2020 1:03 am
by spitra_01
Mine did that turns out I had a bad connection I ended up upgrading my connection to a quick connector. Took me forever to figure this out. Hope this helps
Re: Halp! Max v2 won't heat, shows "DEF" for temp
Posted: Fri Mar 27, 2020 8:30 am
by geneb
Those JST connectors are pretty handy.
g.
Re: Halp! Max v2 won't heat, shows "DEF" for temp
Posted: Sun Aug 02, 2020 9:51 pm
by Solomon Short
My printer had that issue - Both NOZ: and BED: would display DEF randomly. I installed a new hot end and it had the same issue. The connectors were fine at the hot-end, all the way to the RAMBo, where I found that the terminal itself had pulled off the board. The terminal pins were still soldered on, so I pushed it back, and that fixed the hot-end temp reading.
It looks like the terminal pulled loose when I removed the board a while ago, and finally worked itself loose while moving the printer recently. Something to check next time I do maintenance on the PCB.
Good luck, I hope you fixed this and your troublemaker is back up and running.
Solomon Short