Fan controller took a ****, again!

i am using jegs brand universal electic fans. 14" and they only draw 9.8 amps ea. the unit worked killer for a week or so and then outta nowhere it took a **** last night. I am by no means taxing the system. I also have a designated power wire from the battery to the controller. it is 6ga. so it is getting plenty of juice.

I got the fan controller to limit all the clutter with relays and all that. the unit is essentially a duel relay with a thermo static switch.