Several ears ago I bought a Lux thermostat to replace an old round
inaccurate one.
I also had a subtle problem in that some thing did not turn on as expected.
I don't recall if it was the A/C or not.
But go back and check the directions carefully. The Lux was shipped set up
for gas heat (IIRC). There is a small change you have to make to set it to
work on all electric.

Hope this helps

Charlie


"Justin" wrote in message
...
Our old thermostat decided to quit so I am trying to replace it with a
"Lux" Brand from Lowe's.

What's happening it the Heat will turn on if we set it to heat and raise
the temp, but the Air conditioning won't activate mo matter what.
Once when I turned the switch to FAN the circuit breaker cut power.

The Central air unit is fairly old... Here is a picture

http://img139.imageshack.us/my.php?image=img0119ib4.jpg


Here is a picture of the thermostat's innards and how we have it wired:

http://img528.imageshack.us/my.php?image=img0120fz1.jpg

Hopefully I won't get flamed as badly as I did in the other group.
The model is CAG1500
there are five wires: white, yellow, green, blue and red.