Rat Rig Community [Unofficial]RRC[
Rat Rig Community [Unofficial]•2y ago
nite97m

[Resolved] Bed heater stopped heating

While warming up the heat bed to start tuning settings for printing ABS, my keenovo bed heater stopped heating. Based on the logs, bed temp got up to 94c of the target 108c before it stopped heating and started dropping off.

I've had no issues running the bed at 80c and I didn't hear / see / smell anything of note.

Thermistor appears to be fine - it's reporting room temp now that everything has cooled down and temps respond when I put my finger on the thermistor pad on the heater.

  • VCore 3.1 - 400
  • 380mm Keenovo heater, clin SSR.
I'm currently trying to better understand how to test the heater pad itself. I've tried bypassing the SSR (in somewhat sketchier than intended ways) and the heat pad doesn't seem to be getting hot anywhere. Tried checking resistance through the now disconnected mains wires to the pad and I'm getting nothing on the multimeter.

  • Is there something else I should be testing?
  • Is it common for a heater to just stop working?
Hoping I'm just missing something - Heater isn't cheap.
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