I would like to have two thermostats controlling a single furnace. However I'm not 100% sure how I would need to wire everything to achieve the correct effect.
Assuming a thermostat simply acts like an on/off switch, I think that I could run another set of wires in parallel to the existing ones. I believe the current thermostat simply uses two wires. Would this work? Are there considerations as to the type of furnace or thermostat?
I'd add the second thermostat in the basement and normally keep it at a low temperature unless I'm in the room. As it is now with the thermostat upstairs, it's very difficult to keep a consistent temperature below.
I don't want to move the upstairs thermostat because if I'm not in the basement I don't care how cold it gets and the upstairs would become inconsistent.