Solve it!!!
Recalbox is not include in CASE MANAGEMENT the Hat Recalbox RGB Dual, so, the 4 options showed don´t work.
Why? because Recalbox RGB Dual use GPIO 26, it is not usual for Fans beacuse is not a PWM pin, so the fan works as ON/OFF, is not progressive, but better than fix the fan to 5 or 3.3v.

To do it you need to add this in recalbox-user-config.txt
dtoverlay=gpio-fan,gpiopin=26,temp=55000

May be the recalbox masters can add Recalbox RGB Dual Hat in CASE MANAGEMENT options in the next update

Thanks guys

Solve it!!!
Recalbox is not include in CASE MANAGEMENT the Hat Recalbox RGB Dual, so, the 4 options showed don´t work.
Why? because Recalbox RGB Dual use GPIO 26, it is not usual for Fans beacuse is not a PWM pin, so the fan works as ON/OFF, is not progressive, but better than fix the fan to 5 or 3.3v.

To do it you need to add this in recalbox-user-config.txt
dtoverlay=gpio-fan,gpiopin=26,temp=55000

May be the recalbox masters can add Recalbox RGB Dual Hat in CASE MANAGEMENT options in the next update

Thanks guys

I have checked the 4 casemanagements options in Advance settings too

Hi all, i am new here, and new with a rpi4 with recalbox RGB Dual, i am so happy with image quality using SCART in a CRT TV.

But I have a question about Fan pins that offer the Hat, i have installed a fan conected to 3.3v pin and Gnd, (with no changes in config.txt), but with overclock and running Dreamcast games, the Fan not work, i know that the fan is controlled by PWM when is need it, but i can feel high temperature in the pi4.

Should I do anything to make the fan work? or how can i decrease the target temperature to start the fan?

Thanks guys