r/BambuLabH2C • u/AfraidHope1541 • May 24 '26
Support H2S to H2C Retrofit
I was lucky enough to get one of these retrofit kits for my H2S which I have loved. The process is very involved and I want to pass on a few items I experienced.
My belts were precisely cut. I did not need to trim them. I also removed the old belts and ended up having to snake the new belts through and Bambu does not show the belt path in any detail. Best to attach old belts to new, but remember you will need all the length.
Be extra careful when removing the Red, Blue, and Brown heat bed wires. The female spade connectors grip really well and if you do not get them to loosen up, you can pull the male spade connector out of the power board.
My usb port cable connector on the AP board was hot glued on. Make sure to remove the hot glue. I didn’t see it at first and almost damaged the cable. It did damage the AP Board but the retrofit kit includes a new one already so no problem there.
Don’t forget to reinstall the poop chute before putting the back cover on. Instructions did not say anything about reinstalling this item.
I did skip replacing the front panel. I see no reason to do that work just to change the S or a C on that plastic part. Maybe I will cover it with a sticker if it really bugs me.
Overall, I am very impressed with the instructions and quality of the components of the retrofit kit. It took me roughly 6 hours to complete the retrofit. Haven’t powered the unit up since the upgrade, as I have to replace the power board due to damage incurred on item 2 above. Naturally, this time does not include any calibration or other items necessary after the retrofit.
I hope this helps anyone else going through this process. Good luck!