Someone gave me a unused White-Rodgers digital non-programmable heat
pump thermostat - 70 series model number 1F79-111.

I put some batteries in this thing to today just to check out the LCD
screen, and the temp reading is stuck on 72 degrees. Does this thing
have to be wired to show the correct temp?

http://www.sears.com/shc/s/p_10153_1...445S169967202P