Remove cover(s) of t-stat to reveal wires, turn t-stat to OFF and test across RC and Y and then across RC and G.
Test both sets for 24VAC.
I did this, but, RC has no wire going to it.
wires are connected to:
W Y RH G
So i tested RC to Y and G - No current
So i tested RH to Y and G - No current
I do have a readout, and tested the batteries... they are good.
Jumpers are on 3 and 7
3 is RC-RH connected or RC-RH seperate..
7 is Electric Heat
IF not, go to transformer in a/c control box and test primary-line side for 240VAC.
Do you mean the box mounted on the furnace, that has a reen light on and a flashing red light?
Or, he 240 line outside beside the AC unit?
If there, test secondary-load side for 24VAC.
Where is this and how do i test it.
I do have a good meter. And can follow your instructs.
Thanks so much.