E78 error message on newky installed Nest Gen 3 hermostst

[Candy0727]

I recently purchased the gen 3 learning thermostat from Lowes with installation to replace a Sensi thermostat.

The unit is installed, however, it is getting an E78 error that it only detects the W2/aux wire.

When I look at the equipment screen it show equipment sensed on:

Y1-g-w2/aux-c-Rh

Wires inserted 

Y1-c-rh-g-w2/aux

This is from diagram showing equipment detected:

 tge tech said to let the battery recharge then trying to connect again but it seems that the thermostat is not getting or sending signals to my furnace which is gas but my app says heat source is electric.

Help! The tech is supposed to come back today but can't depend on that happening. 

 

[Jhonleanmel]

Hi Candy0727,

Thanks for posting.

I wanted to follow up and see if you are still in need of any help and I hope the technician came to your place to help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Could you send a photo of the wires on your thermostat to check if it matched with what the system detects?

Thanks,
Mel

[Jhonleanmel]

Hey there Candy0727,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

[EmersonB]

Hi everyone,

@Candy0727 just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

I appreciate the help, Mel.

Regards,
Emerson