Old 2 wire 24v heat exchanger furnace

[Badow24]

Hi I currently have a old 2 wire furnace. 24v just curious if the 2 wires are enough, or is there a way to add the c wire to the gas valve. I added a pic. I assume I attach the thermo wires to r and w. I measured the thermo wires and they have 24v.

Thanks for the help 

 

 

[zoeuvre]

Hi Badow24, 

Thanks for posting here in the Community forum and for showing interest in our Nest Thermostats. Are you located in North America or Europe? And could you send us a wiring photo of your current thermostat so I can take a closer look on it? On the other hand, you may use our Compatibility Checker to determine if a Nest Thermostat is compatible with your heating and cooling system.

Keep us posted. We're happy to help.

Best,

Zoe

[Badow24]

Hi thank you for the reply. My current thermostat just had 2 wires one to RC and other to w. I figured out how to rewire the gas valve. Works good. Just remove the jumper in the middle. 

[Badow24]

 

[zoeuvre]

Hi there, 

Awesome! I'm glad that everything has been sorted out, and I appreciate your sharing the steps you took to install your thermostat wires to the terminals of W/W1 and R/RC/RH on the Nest Thermostat base, removing the jumper wire. Also, here's a guide for the installation and setup of a Nest Learning Thermostat. 

If you have questions or concerns in the future, feel free to start a new thread, and we'll be happy to help.

Regards,

Zoe