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Re: Extruder heater overpowered to death?

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Math is correct, but its how its supposed to be. Hotend resistors are over-driven, because 3w of power wont melt abs at 250C.

Measure with multimeter between the leads and heater block, it can be a short between the leads and the block, and current is simply running through the block and bypassing resistor, so there is a small chance that resistor is ok. Normally leads should not have any contact to the block they are mounted in. I use but 1 turn of kapton around resistor to insulate electrical, and i also insulate the leads.

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