On Apr 19, 1:50*am, Ron wrote:
On Apr 19, 1:02*am, Erik wrote:





In article
,

*Ron wrote:
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

Just guessing here... is 72° the 'target', or desired temperature, as
opposed to the current actual ambient room temperature?

Erik

It says in the manual that I have, that the room temp can be set to -/
+ 3 degrees. But, that doesn't answer my question. Does it need to be
wired in order for it to show the actual room temp? Like I said, with
the batteries only, it is stuck on 72 degrees. I don't want to waste
my time installing it if the room temp is supposed to be displayed by
the batteries only.- Hide quoted text -

- Show quoted text -

All the digital battery operated ones I've ever seen only need the
batteries to run all the display functions. Can't imagine why it
would need to be connected. The rest of the process is just
closing one of several relays to connect the wires to the furnace
for heat, cool, fan, etc.

Even they are set in the off position, ie no heat, cool, then
all the ones I've seen display the room temp.