blown heat only - which Nest is compatible with it?

[HOMEBREWING]

Hi,

I purchased a Nest T3019 3RD GEN and I couldn't get past the E80 error message. unit isn't getting power. Its heat only in my house. Help! 

[Patrick_Caezza]

Post a picture of the original thermostat's wiring here

[HOMEBREWING]

won't let me drop picture in but  there's 4 wires, the blue isn't connected to anything, Red to R, Green to G, and Yellow to Y

[HOMEBREWING]

 

[Patrick_Caezza]

The E80 error means No power to Y1 wire detected (cold weather shutoff). You’ll see this code if your air conditioner has tripped a safety cut-out switch that prevents your air conditioner from turning on in very cold weather, or your system might need maintenance.

It looks like you have a simple conventional furnace.

Have you tried this wiring?

Yellow - Y to Y1

Green - G to G

White - W to W1

Red - R to Rc

Depending on where the blue wire is connected to the control board in the furnace you might be able to use it for a C wire.

[MelbaDT]

Hey folks, 

Thanks for your detailed answer and suggestion,  Patrick_Caezza.

HOMEBREWING, how's your thermostat now? Have you had the chance to try Patrick's suggestion above? 

Best, 

Melba

[MelbaDT]

Hey there, 

Checking back in should you still need help with your Nest thermostat. 

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