Propane Furnace Thermostat Wiring

Make a note of which wire goes to which terminal.

Propane furnace thermostat wiring. Terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. In most thermostats the wires are held by. A low voltage thermostat typically runs on 24 volts of electricity and is powered by a step down transformer wired to a standard 120 volt household circuit. Undo the terminals for the two wires connecting the thermostat to the furnace and pull off the wires.

When the red wire is disconnected from w the furnace should turn off. Step 1 confirm that the usual wiring color codes apply to the thermostat to be wired and to the rv s preinstalled harness. Some types may use voltages as low as 6 volts or as high as 30 volts but 24 volts is the most common type. I show where the wires go at the thermostat the color code then down at the furnace control board and how to wire up the wires coming.

Snap the thermostat back into place on the wall. Although there is a conventional schematic no strict industry standards are imposed upon. Thermostat wire color code chart. Repeat this for the red wire connecting it to the r terminal on both the furnace and thermostat.

If no green wire exists you may need to pull a new thermostat wire from the furnace to the thermostat. The thermostat should automatically complete these connections when a set temperature is reached. It should come off by gently pulling on it. Usually they are 24v connections.

So it is safe to assume there is not any airconditioning in this unit. Remove the thermostat from the wall. I can draw a diagram if this is not clear. X or aux wire connects to x terminal and is for auxiliary.

Tracing the wire to the source. The transformer that steps down the house voltage to low voltage is usually mounted on or near the furnace. Rv thermostats are connected to the machines they control using the same color coded wiring harness as is used in conventional homes. For example if the red wire is connected to w on the thermostat the furnace should turn on.

These units have either a 3 wire or a 2 wire tstat connection. Connect the white wire to the w terminal on the furnace and thermostat. This requires an 18 2 or a 16 2 tstat wire and a 24v 2 wire tstat. Connect the green wire to the g terminal on the thermostat.

E wire connects to e terminal and is for emergency heat. It is marked either tt or red and white.