R and RC Power wires

[gDan]

My son has a new Nest thermostat.  His current thermostat for heating and calling has R and  RC wires, for heating and cooling.  However the connection block on the thermostat has only six connections, Y, C, W, G , R, and OB. Where do the to R & RC connect?  Thanks

[Patrick_Caezza]

If the original thermostat has separate R and RC wire and not a jumper, then only the Nest #rd Gen Learning Thermostat is compatible with it.

[gDan]

Can you attach both wires and place one of the wires into the R connection?

[Patrick_Caezza]

That will damage the system.

[MelbaDT]

Hey folks, 

Appreciate your answer, Patrick_Caezza. 

gDan, I'm chiming in to check if this is already good to go. Feel free to reply back if you have more questions. 

Best, 

Melba

[MelbaDT]

Hey gDan, 

Checking back in — still need our help?

Best, 

Melba

[MelbaDT]

Hi, 

I haven't heard from you in a while so I'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