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Hotbed read zero

PlanePilot

Hotbed read zero
January 28, 2016 10:27PM

Registered: 8 years ago
Posts: 5

Bed never heats up and the temp is reading zero. Extruder temp reads room temp. So we read to place a 100k resistor on the pins and the temp reading goes up and the bed starts to heat. All the solder connections look fine. Do I need to replace the Thermistor? Can that be done or is a new board required?

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Dust

Re: Hotbed read zero
January 29, 2016 02:18AM

Admin
Registered: 13 years ago
Posts: 7,001

Zero is normally a break in your wires to your thermistor

Unplug the thermistor cable from the board. Take a ohm reading on the plug threw the thermistor, should be around 100k at 25c..

If its not. find the break and fix it.

It could be a dead thermistor.. you wont know till you start testing the cable...

Edited 1 time(s). Last edit at 01/29/2016 02:18AM by Dust.

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PlanePilot

Re: Hotbed read zero
January 29, 2016 09:14AM

Registered: 8 years ago
Posts: 5

There is nothing going through the thermistor. Any recommendations on where to purchase one?

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Dust

Re: Hotbed read zero
February 01, 2016 09:41PM

Admin
Registered: 13 years ago
Posts: 7,001

Depends where you are... There are a few listed on http://www.emakershop.com/browse/electronics

and absolutely tonnes on ebay