jumpered rh and rc

[chipmilo]

If this has been answered, I can't find where...

My current programmable thermostat has just 4 wires coming in W, G, R, and Y (really blue, but tagged Y).  The R goes into a jumpered RH & RC connection.

When I try to wire up the new Nest thermostat, putting R into R it continually get an E294 Error.   Which seems to imply no power.   Suggestions??

[Patrick_Caezza]

What wires did you select in the app when it asked you to identify the wire being used?

[chipmilo]

I said I had W,Y,G, and R since all I really have is a Red wire

[chipmilo]

I don't feel like I ever got a definitive answer on this.    to repeat, the wires I have coming out of the wall are: W, Y, G, R.   On my current programmable thermostat there are RH & RC connectors which are jumpered together along with the R wire.   

So when I'm trying to set up and install the Nest, what do I tell it I have for wires?

[Patrick_Caezza]

The color of the wire is meaningless as there is no standard.

The Rc and Rh wires are only used if you have a separate heating and cooling system. Most systems are combined and that's why there is a jumper between the Rc and Rh terminal at the thermostat.

The Google Home App during set up for the Google Nest thermostat will ask you to select which wires you have. The options are R, Rc, and Rh. In your case, you want to select the R wire only.

[Ryan_G]

Hey folks,

Thanks for visiting the Google Nest Community. 

Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.

If you have additional questions, feel free to submit another post and provide as many details as possible so that others can lend a hand. 

Hope this helps!

Kind regards,

Ryan

[SHARPpatriot]

Same problem, i believe i said i had a RH

[chipmilo]

Did that work?   What about running the AC?

[Mevans3952]

I just have an R coming out of the wall and in my old thermostat I had a jump from R to Rc with two wires in the R