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Heat-bed Thermistor Only Works When Held  

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DarrellM
(@darrellm)
Active Member
Heat-bed Thermistor Only Works When Held

Hello. I recently bought a new heatbed thermistor from Prusa. I plugged it in, put all the tape on, but then I realized I was having the same issue that I was having before. The heatbed cable would not heat, unless I either moved the bed into a specific position or held the wire in place.
This got worse, until I had to hold it until the bed heated. This made printing impossible, because I cannot hold it all the time, adjusting the wire the entire time. I tried holding it up with a ziptie, but there was simply too much movement. I made sure all the connections were right, and they seem to be fine.

Here is a short video of it:
Sorry for the poor quality, but it gets the general idea down. This “position” changes, sometimes I must pull it to the right to work, down to work, etc.

As told from the support chat, I found out the resistance of the Power Supply is 0.75. The Continuity is 192. (Sorry if I said that wrong, I am very new to using multimeters.)

I would really like some help on this, as the support team is currently busy, and I need help soon. Feel free to ask any questions/cocerns, and thank you for reading.

(Side note: This isn't quite as urgent, but, as you can tell from the video, my circuit box/eletronics box (Is that what it's called?) is not able to stay closed, the screw cannot keep it closed. I am currently using blue tape, which is likely not the best solution, but works.)

Posted : 05/10/2018 3:55 am
DarrellM
(@darrellm)
Active Member
Topic starter answered:
Re: Heat-bed Thermistor Only Works When Held

Posted this in the wrong section, should be in Prusa i3 mk2s section, sorry for that mistake. Is it possible to move this? Or should I repost? Sorry again.

Posted : 05/10/2018 4:00 am
Olef
 Olef
(@olef)
Prominent Member
Re: Heat-bed Thermistor Only Works When Held

Is it possible your thermistor is fine but you have a break in one of the heatbed cables?

Posted : 05/10/2018 7:53 am
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