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when the hotend starts to heat up. the printer starts beeping


jendass
(@jendass)
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Joined: 5 months ago
Posts: 3
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I have about one month Ender 3 MAX. the display shows the hotend temperature -14. as soon as I turn on the heating, the printer beeps.

I tried to upload another firmware, but it didn't help.
Do you have any advice?

Thanks


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kevin
(@kevin)
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Joined: 7 months ago
Posts: 1045
 

@jendass Check if your thermistor at the mainboard is disconnected or has a broken wire.

If it is connected disconnect it and check it with an ohmmeter. It is a 100k NTC type thermistor...so at room temperature, it will read 90k to 100k ohms. the -14 reading indicates it is infinite or open.

The most likely place for a wire break is over at the hot end so check it there...2 white wires with what looks like a glass bead on the end.


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jendass
(@jendass)
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Joined: 5 months ago
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thanks for the reply. Yes, the lead wire is broken. 

can i try to weld it or do i have to get a new one?So that it does not affect the resistance


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kevin
(@kevin)
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Joined: 7 months ago
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@jendass I don't know how to solder. I choose to replace it with a new one. It's not expensive anyway ? LOL.


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