Heat and AC come on using heat setting

[jjc60631]

Installed the Nest Thermostat using Y, R, W, G, & B as common or OB. Same colors in same configuration on furnace. Set thermostat to Heat and picked temp. Both furnace and AC come on at same time. Single stage furnace. 

[Patrick_Caezza]

Post a picture of the original thermostat's wiring here.

You can not go by the wire colors as there is no standard

[jjc60631]

When I do a wiring check in the thermostat it says C is missing as I don’t have Blue wire plugged there. It is in OB. 

[jjc60631]

I figured it out. I did factory reset and redid everything. Working fine in all modes as should!

thanks for helping me out!!

[jjc60631]

Not sure how to add photo. On thee we furnace main board. Red to red. Green to green. Yellow to yellow. Whit to white. Blue to common (c). There is an additional 2-wire cable, red and white. Red to yellow terminal. White to common (c). 

[Patrick_Caezza]

Click on the camera icon 

[Patrick_Caezza]

Do a factory reset to the Nest Thermostat and set it up again using the Home App.

Connect everything one to one with the blue wire going to C.

Then select the following when asked in the app.

R, G/G1, Y/Y1, W/W1, and C

[jjc60631]

That’s exactly how I did it 2nd time and all good now!! Thanks for the help!!

[Ryan_G]

Hey folks,

I just wanted to follow up and see if you're still in need of help. Please let us know as we would be happy to answer any questions you may have. 

Best regards,

Ryan

[Ryan_G]

Hey there,

Thanks for being here in the Google Nest Community. 

I'd like to bump in here and make sure that you’ve seen our response.

Please let us know if you have any other questions or concerns as I will be locking this thread in 24 hours.

Have a great day.

Best regards,

Ryan

[Ryan_G]

Hey jjc60631,

Thanks for being here at the Google Nest Community.

It's great to see that everything seems to be working now. We'll continue to observe how your systems works in the next couple of days and let us know how it goes by replying to this thread.

We really appreciate you always helping us here in the community, Patrick_Caezza.

Best regards,

Ryan