Hi everyone — I wanted to share an important factory assembly issue I discovered with my new H2D printer that could lead to serious damage if not caught early. My printer was shipped with the Purge Wiper Assembly installed incorrectly from the factory, which caused the toolhead to become trapped during the purge and clean cycle — resulting in significant damage to the printer.
What Happened:
While beginning to print, I noticed loud banging noises coming from inside the printer during the purge and clean cycle. After stopping the print and inspecting the toolhead area, I discovered that the Purge Wiper Assembly on my machine had been installed incorrectly at the factory.
Due to this misalignment, the toolhead ended up getting caught behind part of the wiper assembly during the cleaning cycle. This caused the toolhead to become stuck and thrash violently — ultimately leading to damage, including broken wiring on one of the hotend heaters.
What to Look For:
To help others identify this issue quickly, I’m attaching two pictures to this post.
The first is from the Bambu Wiki showing how the Purge Wiper Assembly should look when installed correctly - notice that the pins shown with the red arrow need to be inserted into the chassis:
The second is a picture from my printer showing how the Purge Wiper Assembly was installed incorrectly from the factory. When looking at this photo, notice how the plastic pins were not inserted into the holes in the chassis, as shown in the Wiki reference.
Because the assembly was not installed properly, with the pins left protruding externally instead of seated into the chassis, this caused the metal bracket portion of the wiper assembly to be misaligned. As a result, the toolhead became trapped behind the metal bracket during normal operation, leading to the damage I experienced.
Why I’m Sharing This:
I’m sharing this experience so that other new H2D owners can check their printers and hopefully avoid the damage and downtime I unfortunately experienced. This was a factory assembly mistake — not something caused by user error — and it’s a very easy thing to inspect before leaving the factory.
What I also want to share — so others know what to expect — is that troubleshooting this issue took a substantial amount of my own time. Since Bambu does not offer any phone support, I spent hours diagnosing the problem on my own before I even felt comfortable submitting a support ticket. Due to the complexity of the problem and the amount of documentation I wanted to provide, it took me a lot of additional time to prepare the detailed ticket with logs, photos, and videos.
After submitting the ticket, I tried to follow up using Bambu’s “24x7” online chat system, but I received a message saying that chat was only available during business hours — although those hours were not specified. When I was eventually connected to a chat representative, I was told they could not do anything further to assist me and that I would need to wait 2-3 business days for my ticket to be reviewed by the support team & since it was a Friday the clock wouldn’t start ticking until Monday.
Given that I have invested nearly $3,000 into the printer and accessories, and considering the amount of time I’ve spent troubleshooting, documenting, waiting for support, the downtime involved with shipping replacement parts, and the time I will ultimately need to spend repairing the printer myself — I asked if they would consider providing me with a gift card as a goodwill gesture. The chat representative informed me they were unable to offer any compensation.
While I understand policies are policies — I do feel it’s worth mentioning that with the release of the H2D printer, Bambu is clearly entering the higher-end market segment. However, their customer service experience does not yet reflect that shift. In this price range, I would expect a more elevated level of support — perhaps even in-home service — similar to what other premium electronics manufacturers offer for products like large televisions or appliances.
Hopefully this post helps someone catch this issue early and avoid going through the same situation. I still think Bambu makes an excellent product, but I believe it’s fair to say that their service model has not quite caught up to their growing presence in the premium market.
If anyone has questions or would like to see more details of what I found, I’m happy to share.
Wishing everyone safe and successful printing!
- Domenic
Thanks for sharing.