MK2.5 Bed Not Heating + LED Not Lighting Up (12v From Cables + 1oHm Resistance)
 
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MK2.5 Bed Not Heating + LED Not Lighting Up (12v From Cables + 1oHm Resistance)  

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rotaryfurball
(@rotaryfurball)
New Member
MK2.5 Bed Not Heating + LED Not Lighting Up (12v From Cables + 1oHm Resistance)

Hey all!

My MK2.5 bed no longer heats up. I have measured 12v from the mainboard leads when heated so the mainboard shouldn't be the issue. The resistance of the heated bed reads 1 ohms so it doesn't seem to be that. Thermistor also works (when held between my fingers it goes up and down). So is my heated bed dead? 

I tried powering the heated bed with my 12V power supply and as soon as I turn on the output, the PSU jumps to 1v @ 2 amps. Any suggestions?

 

Additionally, it would give me a min temp error (obviously as the bed isn't moving in temp when prompted to heat. 

Posted : 29/10/2022 2:51 am
Bob
 Bob
(@bob-2)
Reputable Member
RE: MK2.5 Bed Not Heating + LED Not Lighting Up (12v From Cables + 1oHm Resistance)

I'd take this directly to Prusa support, they have diagnostics you can run to isolate the problem.

Cheers

-Bob

Prusa I3 Mk2 kit upgraded to Mk2.5s, Ender3 with many mods, Prusa Mini kit with Bondtech heat break, Prusa I3 Mk3s+ kit

Posted : 20/11/2022 7:57 pm
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