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Replacing the thermistor (temperature sensor) seems to have fixed the problem. If you know how to solder and replace SMD components, it's the PT100 component on the bed heater (see this site https://fbrc8.zendesk.com/hc/en-us/articles/208281963-Heated-Bed-Plate ) and we used this component https://www.digikey.com/product-detail/en/heraeus-sensor-technology-usa/32207605/1759-1009-1-ND/6677788 [specs 100 Ohms RTD Platinum ±0.3% ±3850ppm/°C -50°C ~ 130°C 0805 ].

@Torgeir Thanks for the help. I agree, looks like a temp sensor or else the main board. Will try replacing the thermistor on the heat bed.

@Nicolinux It's the latest stable firmware. I tried restoring to factory settings, but same problem, so must be a hardware issue. Thanks for the suggestions.

What should I do next? Here are some screenshots of the temperature graph (I turned on and off different items in the legend) and also the event log.

I keep receiving this error mid print. "Max temp. error on the build plate. Go to ultimaker.com/ER14" I check the cables on the build plate and the board as recommended. This is the only forum entry I see which addresses the issue:

Active leveling is on. The part is shaped like this when printed: ¯\__/¯ And the dimensional discrepancy is between the build plate and the ends on both ends. So, yes, it's the wrong height at both ends of the part.

X & Y dimensions are as good as usual (within .010").

I am printing a bracket (shaped like a wide V or sort of batwing), dimensions about 7 inches long and .75 inches high (180 mm x 19 mm). Using Ultimaker PLA with Ultimaker PVA support with 0.1mm layer height using (latest Cura and UM3+. The final print is only .69 inches (17.5 mm) instead of .75 inches, so the Z is off by a lot. I measured before dissolving the support, so it's not warping. I can't show the whole part because it's a corporate design, but here are some images which I think show enough. The only idea I have is PVA shrinkage during print (maybe water content, material pops a little during print, but doesn't seem soft or sticky and it adheres fine) Any suggestions what is the cause? Thanks.

I'm curious to know this too, haha!

From the "What to expect in 3.7" firmware blog entry: Thanks. This is what I asked for in the second question of my original post.

Yes, I would have expected the firmware release notes in a dedicated page like the Cura release notes: https://ultimaker.com/en/products/cura-software/release-notes

Are you using support material?

Had that happen to me once. For some reason something broke free of the plate and stuck to the nozzle, and so any new material would just build up around the head since it was being deposited in midair. Took me over an hour, but I manually heated up the print core and used tweezers to pull as much softened material as I could. Then I took out the print core and used a micro heat gun (used in soldering rework) to free up residual material. Luckily it was PLA, so it had a relatively low temperature. And luckily the electronics board on the print head was clean so I stayed away from that. Thought I would have ruined something, but it all came out OK. The only damaged part was that white silicone-type gasket which the nozzle protrudes through, but it's not too bad. Hope you have similar luck.

In this specific case, no, but usually yes. What do you mean by "that"... do you mean the prime tower isn't hairy like in the photo?

Same here on both counts--Cura disconnects sometimes, and UM3 forgets who I am often. Windows 10 / Cura 2.5.0 / UM3+