Thermal Runaway Problem

A forum dedicated to the stock LulzBot Mini 3D Printer
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Vertech
Posts: 1
Joined: Mon Apr 15, 2019 5:11 pm

Thermal Runaway Problem

Post by Vertech » Mon Apr 15, 2019 5:17 pm

Hi guys, I seem to be having a problem with my heated bed. The bed seems to be heating slower than normal, but was able to maintain temp when manually heated. However once the hotend starts to heat a well the beds temp suddenly plummets, and eventually I get a Thermal Runaway notice at the printer stops.
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nopick
Posts: 974
Joined: Mon Sep 09, 2013 11:14 am

Re: Thermal Runaway Problem

Post by nopick » Tue Apr 16, 2019 9:27 am

Inspect the power wires from the bed to the control board.

jim2386
Posts: 327
Joined: Sat Mar 07, 2015 1:46 pm

Re: Thermal Runaway Problem

Post by jim2386 » Mon Apr 22, 2019 9:54 am

When I had this problem, the power wires in the cable chain connected to the bed were broken. When the bed was in one position it would heat just fine, but when the bed moved, the wires would make/break contact and would throw up a thermal failure. I'd start there.

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