Any help would be greatly appreciated.

Driving back from Ford Fair this afternoon, my water gauge was all the way to the 'N' on the gauge. I was sitting at 70mph, not giving it all hell. Ive got a cosworth fan switch, the fans are cutting in fine. I've got two mounted in front of a GRS full front intercooler.

The thing is, if I turn the heater gauge up in the car, the temp eventually drops back down to the middle of the gauge between o and r. (But I and my passengers melt from the heat in the car!)

Could it be the thermostat, or should I mount the fans inbetween the cooler and rad???

CheeRS in advance