I have a standing pilot with no electronic ignition.
I have a 110VAC Power switch on the outside of the furnace in a handy box.
If I turn the power off there the pilot light goes out. The transformer is Off.
Turn 120VAC back on and I can light the pilot and it stays lit. I have to manually light the pilot after the power goes off.
I just have a heat no AC.
My transformer has a blower relay on it.
Transformer terminals are C, R & G
Transformer C goes to one terminal on the Gas Valve.
The other terminal of the Gas valve goes to C on the thermostat.
R and G go directly to the thermostat.
The transformer C & R terms are labeled = Load.
If I measure voltage between R on the thermostat and either terminal of the Gas valve, I get 24VAC on both the terminals.
There are wires connected to G & C which look like they go inside the Blower relay.
I just don't quite see how the three terminals work together.