Hi, long story short last year my ac unit outside would not turn off automatically and I figured out that the wiring was horribly wrong. I recently fixed the ac wiring to get that working but I'm confused with how the gas valve on my furnace should be wired. The valve is wires correctly to the transformer but I removed the two wires that went to the thermostat so obviously the valve won't turn the gas on when I call for heat. My question is how do I wire the valve to the thermostat? I know the th is for the thermostat. From what I read the th-tr is also used but I dont know what wires go where. Really dont want to call someone to do this for me since it will probably take no time at all and would be a waste of money.

I have a two sided wall heater in which I need to replace the gas valve. The gas valve looks very similar to the one in the attached picture except that the red plastic piece is burnt and missing. The valve has on the number 18601 A on the bottom with no other distinguishing marks. The two sided wall heater also has no distinguishing marks, and I assume was installed at the time the house was initially built in the 50s or 60s. Can anyone please identify a suitable replacement valve? Due to cost at this time, I would rather not replace the entire unit. Thanks for your help.