outside air temp slow to respond

[Sarge1400]

My outside air temp reading is very slow to respond to increases in temperature. If it's 50* when I park it at night, and 80* when I get in it the next day, it takes hours for the display to climb to the proper temp, doesn't seem to have any trouble when the temp drops however.

I have already replaced the sensor in front of the radiator.

 

[typhoon5000]

From what I've read in the Ford manual, the sensor feeds straight into the EATC and an internal circuit translates the resistance signal into a temperature display. If you've already replaced the sensor your only two options are try swapping the EATC or there's a short in the wiring causing resistance distortions. The wire is RED with an ORANGE stripe. It should read 5 volts coming out of the sensor and at the connector on the back of the EATC (pin 1, also Red/Orange stripe). If you're getting 5V at the EATC then I would say it's the circuit in the EATC.