Wiring help Gen 3 wiring

[Jfoo]

Hello.  I cannot get my 3rd gen nest learning thermostat to power up.  

i have 5 wires on my old honeywell thermostat.  W, Y, G, C and R/RC jumped.  

anyway, i tried following directions.   
W to W1

Y to Y1

G to G

C to C

jumped R/Rc to R

doesn't work.  I have no power, wont turn on.  
Am I doing it right?

 

 

[MetalGlacier]

It may just be that the thermostat battery is dead so try plugging a usb cable into the back and charge it for a couple of hours and try again.

[Jfoo]

Ok, let me charge it.  

so, it needs battery to power up even when its installed?

Is my wiring correct?

Thanks!

[Jfoo]

I got it to turn on but its getting me an E79 error.  I flipped the CB off and on, check the wires make sure they are inserted and still getting error.

[Jake]

Hey Jfoo,

I wanted to check in and see if you are still in need of any help. Please let me know, as I would be happy to assist, and answer any questions you may have.

Best regards,
Jake

[Jake]

Hey there,

I wanted to check in with you, and let you know that I will be locking the thread in 24 hours.

Best regards,

Jake

[CoolingWizard]

An E79 error indicates the C wire is not receiving any power from the HVAC equipment transformer.

The AC Cooling Wizard

[Markjosephp]

Hello folks,

I wanted to stop by and see how I could help.

I appreciate your help, @CoolingWizard and @MetalGlacier.

@Jfoo, your common wire may not be properly grounded, so the system uses power sharing but doesn’t get enough energy. Try removing the C wire, leaving it disconnected, and restarting your thermostat after the changes. Also, please gather the power readings with and without the C wire under the Technical Info option.

Note: Turn off the power from your HVAC system at the breaker box before touching the wire.

Keep me posted on how it goes.

Regards,
Mark