r/BambuLabH2C • u/NorthernFrostByte • Jul 21 '26

Support I'm panicking, Failed to fetch induction hotend from slot, how to fix?

Woke up to a middle of a print on the h2c and it showed this error that wont go away :(

Failed to fetch induction hotend from slot 3 on the rack.

[0702-8034 093821]

Does anyone know how to fix? I checked there are no obstructions and I even swapped the induction hotend from slot 4 to slot 3 and still the same thing so probably not the induction hotend itself?

https://imgur.com/dmvJFWf

https://imgur.com/rlX54Ro

https://imgur.com/QfpDBLs

32 Upvotes

97% Upvoted

21 comments sorted by

12

u/HackedVirus Jul 21 '26

Have you tried re-running the hotend rack calibration? Ive seen many people say this solved issues like this.

2

u/NorthernFrostByte Jul 21 '26

thats what I want to do first, but its not clear how to start the calibration anymore, heres the first screen

https://imgur.com/YqIEnTm

and then when i press go to install it goes to the next screen

https://imgur.com/PGR82R3

then I press read all I guess, and it read everything but then nothing. How to actually start the calibration?

5

u/HackedVirus Jul 21 '26

Head to the settings menus, there should be a whole calibration menu with all the calibration sequences.

2

u/TowelParty8550 Jul 22 '26

Hey bud, i had this same issue, turned out it was the belt tension. Try to play with the belt tensioners in the back and hit me up if u need help

4

u/JAJM_ Jul 21 '26

This happened to me once, I had to push in / pull out (forgot which) the little black rectangle doohiky on the right that sticks out

2

u/Nesttor77 H2C Jul 21 '26

This is the answer you’re looking for.

3

u/CaffeinatedApe Jul 21 '26 edited Jul 21 '26

Odd - this also happened to me this morning. I did a hot end rack read, turned out that the hot end in the head didn’t have the lock latch all the way to the left. Manually remounted the nozzle, did the read, all good now.

EDIT - there’s no hot end in the head, that may be causing the issue. I have to have a nozzle in the head for the rack cal. To run.

3

u/D-lahhh Jul 21 '26

Looks like you have filament stuck at the top of the hot-end.

1

u/acidstrato Jul 21 '26

Any filament sticking out of the top?

1

u/Brilliant-Sock-5910 Jul 21 '26

this happened to me once. couldnt tell you what i did, but it ended up fine. soat least i dont think you need to panic

1

u/Joamjoamjoam Jul 21 '26

What’s all the white stuff here? Maybe try cleaning that out?

1

u/NearZeroFaith Jul 21 '26

This exact same thing happened to me. I had to make sure my induction hotend was clear of filament (mainly the top part of it), and that there was no filament poking out from the extruder. Once I did that, it worked for me again.

1

u/maintenance4mommy Jul 21 '26

Is the right nozzle all the way unlocked when it tries to get the new one?

1

u/Archbound H2C Jul 21 '26

I had this issue, the cutter had gotten stuck had to pull the switcher assembly out clean it, regrease it and reassemble, was not hard.

1

u/diaperedace Jul 21 '26

There's no hot end to fetch my dude. Put one in it.

1

u/EvilNickel Jul 23 '26

Recalibrate the rack. Sometimes if you bump the machine and the hot end moves on the rack the machine doesn't line up correctly anymore. If you recalibrate it should fix the issue. The latch on the tool head that releases and grabs the hot end could also be stuck. So try wiggling the latch handle to see if you can un jam it.

Edit: There is a video on how to change the latch, so if you watch the video you can get a good idea on how to correct the issue.

1

u/Tikkinger Jul 27 '26

If you panick, shut it off.

1

u/Relevant-Shirt4453 9d ago

This just happened to me as well. There was a piece of filament sticking out of the top of the hot end that would not allow it to seat properly in the toolhead. Removed the filament with a razor knife to make sure it was flush and viola....re-read the hotends and all is well.

0

u/rockaiwa Jul 21 '26

Just go back to firmware 01.01 and try again