How can I get my thermostat C wire connected?

Question

I have an older furnace, on the switch block I have Y,C.W,R and an unlabeled screw that connects to the shut off it looks like. I need to hook up a thermostat that needs the C wire. I have a spare wire, in the bundle which I hooked up to the c terminal downstairs, from these videos that I've seen it tells me to then bridge the Y and G together, I do not have a G on the block, what do I need to do to get the neutral wire set up

Answer 1

You have a C wire, so use it - you don't have to bridge as that is only necessary if you don't have a spare wire.