Topics created by MikeWittt

@mikewittt said in Fan and lights turn off as i attach the thermistor???:

Hi, i just installed the smart effector on my delta with a duet maestro and the above happened.
I first attached the thermister through the 8pin connector and later straight to the thermistor. The temperature seems okay, but the hotend fan and the leds wont run.
If i take out the thermistor they go on???

Any idears?

You have configured Fan 1 to run thermostatically when the hot end temperature is 45C or above (see the M106 P1 command in config.g). So it wil be off below that temperature. When the thermistor is not connected, the firmware doesn't know what the hot end temperature is, so it turns the fan on as a precaution.