Question on C wire that my old tstat don’t have

[DannyBevills]

Trane electric AC/gas heat installed 2000 Honeywell tstat. Only has 4 wires connected to R, W, Y, G. Durning my installation, I saw a note pop up that I didn’t have a C which would provide constant power. I can’t find where to go back to see if I can add a jumper. It is working but will probably run down the batteries quicker. Can I install a jumper? Here is pic of old tstat. Yes, the wire on the Y is actually blue in color, but I put a Y marker and put on the Y terminal. 
Thanks

[Ryan_G]

Hi DannyBevills,

Thanks for reaching out and we're sorry for the delay.

If you're using the Nest thermostat 2020 and you saw the message that you need to have a common wire connected, you can do a complete factory data reset and then install the C wire and you could run the set up process again. That will detect the newly connected C wire and you'll be able to get a stable power to keep your thermostat running and connected to your Wi-Fi. That will also save the 2 batteries at the back of it.

I hope it helps.

Best regards,

Ryan

[DannyBevills]

Ryan, thanks for the reply. I don’t have a C wire. My old thermostat didn’t use one. Could a jumper from the red power wire be connected to the C terminal in the nest?  Thanks 

[Ryan_G]

Hi DannyBevills,

If your system doesn't have a C wire available or a spare wire, you could check out this Nest Power Connector. This will provide a stable power to your thermostat to prevent Wi-Fi disconnection and to prevent the battery from draining.

I hope it helps.

Best,

Ryan

[aatienza]

Hey DannyBevills,

I'd like to jump in here and check if you've seen Ryan's response. Let us know if you need more help by replying to this thread.

Thanks,

Archie

[aatienza]

Hey DannyBevills,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.

Thanks,

Archie