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Posted: **Sat Feb 08, 2014 6:55 pm**

My hotend is no longer working. I have checked the voltage at the “Heat 0” terminal on the Rambo and I get zero. I checked all the terminals at main power port and they show 12v as expected. Repetier shows max power being sent to the hotend.
I changed the line in the config file from

Code: Select all

#define EXT0_HEATER_PIN HEATER_0_PIN

To

Code: Select all

#define EXT0_HEATER_PIN HEATER_1_PIN

And still got zero on HEAT 1 terminal.

also checked the F3 fuse.. should there be 12v across the F3 fuse?

Any suggestions??

Posted: **Sat Feb 08, 2014 7:34 pm**

You did not say if you checked the small fuses.
Turn the power off and pull the small fuses.
Check them for continuity. They should read 0 ohms.

Posted: **Sat Feb 08, 2014 7:56 pm**

fuses have continuity

Posted: **Sat Feb 08, 2014 8:00 pm**

I am at a loss here...

Posted: **Sat Feb 08, 2014 8:15 pm**

It was F3 after all. I got heat!

Another question, should both LED2 and LED4 light up while heating a single extruder? I have never paid attention to this before.

Posted: **Sat Feb 08, 2014 9:13 pm**

I think SeemeCNC set the second one to turn on a fan.

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Hot End Not Working

Hot End Not Working

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Re: Hot End Not Working

Re: Hot End Not Working