Anyone have support cover fixing a thermistor connector that detached from the circuit board? I submitted a ticket and got a warning to expect delays due to holidays. Is it even worth waiting for support or should I just buy a new one from the store? It’s $50 so not the end of the world but it also feels like this is a known weak spot (now that I’ve research my issue) when changing hotends
This happens to many people who don’t realize there’s a latch on the bottom of that connector. A year+ in, I’ve managed to avoid that particular problem, and I’ve removed and replaced hotends multiple times.
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It doesn’t seem like it’s even connected to the board beyond friction on the pins. It just slipped right off the pins. No soilder, no glue. I’m not a PCB expert but this seems like a particularly weak design. The official bambu lab YT video about replacing hotend says nothing about the clip. I came across that later while researching options to fix it.
Do you have a picture of the failure? I ask because if you feel confident handling a $10 solder iron, thermistors are about $5 per 100.
If it’s a break in the wire, simple soldering a new thermistor is an easy DIY repair.
If the wire came out of the connector, then you probably don’t want to hassle with it.
But as I was searching on Amazon, sweet Jesus, there’s whole host of competitors selling replacement parts for under $20 with 2 day shipment. Here’s the search term.
https://www.amazon.com/s?k=bambu+lab+thermistor
This may be a worthwhile exercise nonetheless to lessen your dependence on Bambu while you’re waiting on Bambu to come back from the Chinese New year. If it doesn’t work, Amazon’s no-questions-asked return policy is your friend. What do you have to lose?
The problem is the socket attached to the toolhead board, not the plug on the thermistor. The shell tends to pull off easily.
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Do you have a photo of the damage? I’m having a hard time visualizing what you mean.
The “housing” that is normally attached to the PCB came off with the connector. The thermistor itself isn’t damaged. I tried to slide it back on but I can’t seem to line it up and the pins bend very easily.
OK. Thanks for clarifying that. You’re referring to the JST-style PCB header on the board. The good news is that if Bambu doesn’t cover this under warranty, which they probably will, it only costs $11 to replace the entire board. Judging by the quick repair you already performed, this should be a cake-walk for you.
Keep in mind that 1) older printers may have the V8 board in which case you need the full replacement set (two boards and a cable), 2) you need to know which variant of Lidar you have to order the correct board.
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You may have just saved me $40. I was about to buy the whole tool head board. I have the v9 (single ribbon). The interface board is out of stock for 3wks but the TH board is available now. I have the patience of a 5 yo 
Does the thermistor wires have a polarity? or can we solder the wires either way?
Thermistors do not have polarity.
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