Thermostat wiring question

[LarryRe]

My existing thermostat is connected to W and RH with a jumper to RC how do I connect my nest.  I don’t see RH or RC?

[Houptee]

You never use jumpers on a Nest or any brand smart Tstat.

You will put R to R and W to W but you need a C common wire from your system to keep the Nest powered and charged.

Is there a spare wire in the cable not being used otherwise its best to pull a new 5 conductor thermostat cable to the Nest and connect Blue to C and on the system end connect to the C terminal on the board (if you have a C terminal).

Post pics of the wires at the heating system so we can determine if you have a C terminal to use.

[aatienza]

Hey there,

Checking in — we hope you've got the answer you're looking for. Let us know if you have more questions in mind.
 

I appreciate the help, Houptee.

Thanks,

Archie

[aatienza]

Hi there,

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

Thanks,

Archie

[EdwardT]

Hi LarryRe,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward