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    Error: Temperature reading fault on heater 0

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    • A Former User?
      A Former User
      last edited by

      if you measure the resistance across the two pins of the thermistor plug, when its not connected to the board wht do you get?

      felixlvhundefined 1 Reply Last reply Reply Quote 0
      • felixlvhundefined
        felixlvh @A Former User
        last edited by

        @bearer said in Error: Temperature reading fault on heater 0:

        not connected to the board wht do you get?

        @bearer , i got reading 80.3K

        A Former User? 1 Reply Last reply Reply Quote 0
        • A Former User?
          A Former User @felixlvh
          last edited by

          @felixlvh said in Error: Temperature reading fault on heater 0:

          80.3K

          config says its a 100k thermistor so it should be about right

          maybe you should connect vssa directly to ground on a unused thermistor input now that you have nothing else connected; power from usb and see if that makes a difference

          felixlvhundefined 1 Reply Last reply Reply Quote 0
          • felixlvhundefined
            felixlvh @A Former User
            last edited by

            @bearer Thanks, i am still uncertain about the vssa fuse. if you see the image here, https://ibb.co/TYb2MNS i got reading 90.9K. i can now confirm board is v1.01.

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            • A Former User?
              A Former User
              last edited by A Former User

              you should get pretty much 0. (or at least single digit ohms)

              if you have a wire handy, run it as shown here, connect the thermistor to e0 or bed and power from usb.

              1758b6d1-6087-4aab-90aa-29698c5a34e8-image.png

              (it'll bypass the fuse, which should be safe when only the thermistor and usb is connected)

              edit: seems the 1.02 board do not have a resettable fuse
              https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers#Section_VSSA_fuse

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              • felixlvhundefined
                felixlvh
                last edited by felixlvh

                @bearer said in Error: Temperature reading fault on heater 0:

                vssa directly to ground

                @bearer If i did it correctly, It still shows the same error 2000'C

                error.jpg

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                • A Former User?
                  A Former User
                  last edited by

                  you've got the thermistor connected to e1 and configured for e0? move it to e0?

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                  • felixlvhundefined
                    felixlvh
                    last edited by

                    @bearer said in Error: Temperature reading fault on heater 0:

                    configured

                    @bearer OMG, E0 works!

                    e0.jpg

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                    • A Former User?
                      A Former User
                      last edited by A Former User

                      so you need a new fuse, ref the wiki link above.

                      edit; and you probably have to remap or repair fan2 as well.

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                      • felixlvhundefined
                        felixlvh
                        last edited by

                        @bearer am i right to say usign external fuse like this? can i still print by bypassing it temporarily? thanks a ton!

                        external fue.jpg

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                        • A Former User?
                          A Former User
                          last edited by A Former User

                          if the pins read vssa and gnd, then yes. (also very low value fuse, less is better, wiki says "between 125 and 250mA and a resistance of between 2 and 4 ohms.")

                          you can print with a bypass either a wire instead of the fuse, or like you tested - BUT there is likely a reason the fuse blew and the fan blew - your fan and thermistor have likely shorted on the hotend; and if it happens again with no fuse the CPU will likely be damaged.

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