Hot End Not Working

[aerouta]

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??

[Eaglezsoar]

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.

[aerouta]

fuses have continuity

[aerouta]

I am at a loss here...

[aerouta]

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.

[Eaglezsoar]

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