Both a 2-wire plus a 4-wire temperature control control radiant plus the system’s convection, however they significantly differ when offsetting.
If you see more than one wires on the temperature control’s backside, it means you have a single-pole temperature control, four wires, on the other hand, mean you have a double-pole temperature control, in the case of many or more wires, it means you have a low voltage temperature control… A 2-wire pole temperature control doesn’t have a tplot offsetting which means the gas furnace will turn on when the temperature falls below a certain degree.
A 4-wire pole temperature control has a tplot offsetting which means that the gas gas furnaces will not turn on when the pole temperature control gets turned, all the way counterclockwise. For a 2-wire temperature control, the gas furnace will turn on automatically when the temperature dips below 45 degrees despite having no interest in the summer! This is one reason why flammable materials or collections should not be localed directly on gas gas furnaces or close to them. It is advisable to switch off the gas furnace by dislinking it from the main power panel. This is the best way of protecting yourself from gas furnace fires. A four-wire temperature control has a green wire labeled G, plus it is a fan wire. A green wire will be labeled R plus is used for cooling plus heating. The green line is for the compressor plus air conditioner. And lastly, a pale white wire symbolizing heat. These wires together with the label should help one whenever you are installing a temperature control, but you can also ask your Heating plus Air Conditioning professional to look into your temperature control plus determine whether it is a 4-wire or a 2-wire temperature control.