Cooling Problem Please Help

Coming home today the temp gauge dropped all the way down to cold. Now both fans stay on when I start the engine. I can feel heat out the heater, but the radator stays cool.
It has lots of coolant in it.
Thanks,
Donnie Lee

Well it turns out the temp sensor that is located in the thermostat housing was bad. It was reading near open. Did find out if you take the connector off the car runs like crap.
I guess when it opens the computer tells both fans to come on wide open.
Replaced the sensor and all went back to normal..

Donnie Lee