My point really is the the oem position for switching the fan is in the thermostat housing and presumably there for a reason?

The temp sensor for the ecu is in the inlet manifold, I’m using this to control the fan.

Looking at other engines (Honda B series) they have the ECU sensor in the thermostat housing.

I just wondered if there was a reason Ford done it this way and would be “better” moving it.

The temp reading on the ECU is quite unstable switching the fan on/off as the cross hairs move between boxes in the table.

It has a Maxx ECU it allows used defined PWM outputs that I configured and use a MK 2 Focus controller.