I never have trusted the controllers to turn on my fans, so I wire them with a toggle switch that I control. I rarely forget to turn it on and am more reliable that any controller we have bought. Dan has a SPAL controller on his rpu and we had to call SPAL because it wasn't coming on, they told us to put juice into the green wire which effectively keeps it running all the time at 100%. It is coming out when we put his engine back in and a toggle switch is going in it's place.

Don