Hello - I'd appreciate any help that you are willing to give. I have a natural gas heater. I am replacing an old thermosat with a new programmable unit. When I removed the old unit, I flagged my leads and taped them to the wall (2-wires only)... Somehow they came untaped and slipped into the wall. In the process of recovering them, The flags came loose and now I don't know which is which. I tried metering, but there is no voltage present (I'm not sure if there should be...) Upstream is an ITT general controls 860 gas valve. The 2 screws that the old wiring are attached to both say TH (for thermostat, I'm guessing), The opposite screws (going to the gas, I'm guessing) are both labelled PG. If there's any question of doing damage, I'll call in a professional. But it seems a bit of a shame for 2 screws.... Thank you (And there's no need to tell me that I'm an idiot. I already know. Thanks)
-- Ren.