# Marlin Cooling Fan Select

**URL:** <https://forum.lulzbot.com/t/marlin-cooling-fan-select/4622>\
**Category:** Software\
**Created:** [February 24, 2017, 11:00pm UTC](https://forum.lulzbot.com/t/marlin-cooling-fan-select/4622 "2017-02-24T23:00:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nbmoretto](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/nbmoretto/32/9203_2.png) [@nbmoretto](https://forum.lulzbot.com/u/nbmoretto)\
**Post date:** [February 24, 2017, 11:00pm UTC](https://forum.lulzbot.com/t/marlin-cooling-fan-select/4622/1 "2017-02-24T23:00:15Z")

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I am finishing up my custom dual extruder mount and ran into an issue with the part cooling fans. The default extruder0 fan (FAN\_PIN 8) turns on when cooling fans are turned on. I would like for the extruder1 fan (FAN1\_PIN 6) to also be controlled by this setting. Is there a way to change this in the firmware? Or am I stuck just having to wire the two in parallel?