Nest 3rd Generation won't turn on

[rhetthuff]

Hi, I've got a used 3rd gen Nest. I have manually charged it, and when connected to the base, it flashes green (quick) - off - yellow (longer) - green (longer) - off, and repeats indefinitely.

If I press and hold for 10 seconds there's a quick red light in the mix, but no other changes. The screen will not turn on.

I've had a different 3rd gen Nest on that base, and it works as it should. I just want to swap this one in for cosmetic reasons (gold vs silver).

Any info on how to get it up and running would be greatly appreciated! Thanks

[gmelanymelissa]

Hi rhetthuff,

Thanks for posting here in the community. I'm sorry to hear you're Nest Learning Thermostat (3rd gen) won't turn on. I understand you want to swap the other Nest Learning Thermostat (3rd gen) for cosmetic reasons. I appreciate all the efforts you've made to resolve this inconvenience. I'm happy to help!

To better understand the situation, I'd like to ask a few questions:

• Is the thermostat's display seated properly?
• Are all the wires of your thermostat seated firmly in its terminals (with no loose or exposed wires)?
• Do you have a conventional HVAC system (furnace and AC) or a heat pump system (single unit for both heating and cooling)?
• How long did you charge the thermostat?
• When did the issue first start?
• Are the power breakers on, and is your home receiving power?
• Additionally, please share a picture of your previous wiring configuration and the current one to determine the compatibility.

Once I have these details, I can assist you better with the specific information.

Keep me posted.

Regards,

Melany