On Tuesday, December 10, 2013 12:40:35 PM UTC-5, Danny D'Amico wrote:
On Tue, 10 Dec 2013 09:16:34 -0800, wrote:



The photos appear to show a heating only thermostat, a very basic

one.



My fault...



I should have mentioned that the thermostat also controls the A/C.

Here is a picture showing the "COOL" setting:

http://farm8.staticflickr.com/7343/1...33aae09d_o.gif

Then I agree with Rick, blue should be for cooling. I saw
something on the left, but I didn't see anything labeled for
cooling vs heating on the thermostat housing and whatever
was sticking out, looked very small. Almost like it was cut
off.

So, hook red to white and the furnace should fire up.