Wiring question

[twodirtydogs]

I just got a Nest Thermostat and am confused about the wiring.  I have Y, G, and W wires, they're easy.  Then I have red and black wires going to RC and RH respectively.  Those RC and RH wires are also linked with a cross-over wire.

My new Nest thermostat has places for Y,C,W G, R and OB. 

My question is, where would I install the RC and RH wires to?  See pics below for current and new.  BTW, I have a separate furnace and A/C but a common fan.

Thanks in advance!

 

 

[24Vme]

Your current thermostat is wired wrong, when you have RC and RH, the cross-over wire is not supposed to be there.  The new nest not going to be compatible with your current setup if you have RC and RH.  The older NEST E will support RC and RH I think.

[1007gary]

Check out YouTube ONE HOUR SMART HOME. You will see detailed explanation for NEST connections.

[Ryan_G]

Hi twodirtydogs,

Thanks for reaching out here in the Google Nest Community.

It looks like you have a dual fuel or dual transformer system because of a separate AC and furnace. Check out this link to know which Nest Thermostat is compatible with your HVAC unit.

I hope it helps.

Regards,

Ryan

[Ryan_G]

Hey twodirtydogs,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have. 

Best regards,

Ryan

[MelbaDT]

Hi, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

Best, 

Melba