Jump to content
Ultimaker Community of 3D Printing Experts

Is the "Heater board" from upgrade kit (original) necessary?

Recommended Posts

Well. I suppose you talk about thr small pcb that comes with the bed upgrade?

That little board has a pt100 sensor, 24V to heat the bed and a bridge to keep all connected. So, you can't plug it just like that. I think the small board might be available if you ask to resellers. Maybe someone has one in stock?

Also maybe someone knows a trick or a pcb that works with that?

Edit. Maybe I'm wrong and you talking about this? https://www.youmagine.com/designs/ultimaker-heated-bed-mosfet-relay-hack-v2

Share this post

Link to post
Share on other sites

Hi funkydrgonzo,

As I'll understand this is an upgraded UMO become an UMO+?

So you have a separated heat bed PCB with the PT100B sensor..

First, you cannot conect direct to the mother board in your printer!

You have to repair your old PCB or buy a new PCB.

I'll guess you mean Q2 here? Have tried to zoom into it but cannot see the type number on top of the Mosfet. Is it a burning mark going across?

Maybe someone else have this type number?

It is not that difficult to change this circuit, but you'll need some skill to do it.

If you can’t do it yourself, find a radio/electronics repair shop or maybe a friend (with this skill) as neotko suggested to help repairing your heat PCB.

There should be some more information about this PCB in github.com, a schematic would be nice to have, but I can't find it.

Good luck.



Share this post

Link to post
Share on other sites

Great info neotko!

The (N)MOSFET you'll need is CSD18501A from Texas Instrument.

You can buy it here:


But min. order is 5 each. but it's not to bad.. RS is all over the globe, but this is the one in GB.

I've made some modification of your picture, so you'll see how to remove it and how it is orientated..

But you'll need a proper side cutter to do it, and knowledge how to proceed, -if you do not know - forget it and leave it to someone that do know.

OK., here's a picture with some info.


Good luck.




  • Like 1

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 95 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!