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Labman

Thanks so much for the reply-

Looks like my red and white go to the thermostat and then I have
A blue that goes from the transformer to the gas valve
And branches to the fan switch-...

Hi-

I have a furnace that I need a common wire to hook up
A new thermostat that req's a common wire-
The Company that originally made the furnace, BDP - merged
w/ Carrier I think-

I have...