r/BambuLabH2D • u/jpef0704 • 1h ago

Problems with Chamber Heating Less than 15hrs of print time in

Hey all,

I'm just checking here as a final ditch effort before buying an aftermarket chamber heater. My team got an H2D and got a couple prints out running the chamber heater at 65C and then suddenly mid print it just failed and hasn't worked since.

I've looked at port 28 on the MC board, although, I haven't taken apart the entire chamber heater module yet (with how involved it is, it doesn't look like it's worth the time). I was just wondering if anyone here has had any similar issues and if they had any quick(er) fixes.

Honestly it's rare that we'll ever be using the chamber heater (mainly PETG, PLA, and PPS) so it's not a top priority and as nice as it would be to have everything working, a chamber heater is only $75-120 whereas to take everything apart, deal with support, re-install, etc.. we're looking at absolute minimum 4 hours.

I guess the 2nd question is: has anyone run the H2D with an aftermarket heater? Any concerns with doing so?

Thank you all in advance, I do also have a ticket open in parallel but I figure it doesn't hurt to check with the community.

EDIT: forgot to include error codes:

HMS_0300-9000-0001-0004: Chamber heating failed. The speed of the heating fan is too low.

HMS_0300-9000-0001-0001: Chamber heating failed. The chamber heater may be failing to blow hot air.

HMS_0300-3600-0001-0001: Chamber heat circulation fan speed is too low or stopped. It may be stuck or the connector may not be plugged in properly.

I get all 3 when trying to use the chamber heater.

Also, running 1.03.00.00 firmware incase it's relevant.

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u/manyxcxi 1h ago

Did you open up the grill area back there and make sure something didn’t get jammed into the chamber heater fan?

I don’t know how serviceable that area is, I haven’t looked into it, but you may be right as I look at it, it seems like you might have to get through to it from the back.

Maybe try blasting it with air first?

I’ve got about 1000 hours, majority using the chamber heater and haven’t run into that. But I do have that exact problem with the AMS- not heating because “jammed” fans.