My current thermostat uses a simple red wire/white wire system used for just the gas furnace. I recently purchased a wi/fi thermostat which also requires a common wire for power. It is very clear in the directions that this thermostat will not work without it. I hooked up a third wire on the furnace logic board labeled C (which I assume means common) and put everything back together. The red and white wire were also attached to this board.
I then stripped back this third wire to measure voltage assuming it would read 24 volts , but I got no voltage at all.
Note: I cannot voltage check the connector itself because this panel has a rocker switch which prevents operation without the panel being attached.
Did I have the correct wire connector on the logic board?
Any suggestions as to what else I could do?
Thanks in advance.
oops title should read common wire.