B and w terminals. No R????

[Hoops508]

My Honeywell thermostat has a black and a white wire. They were hooked up to the w terminal and the b terminal. No other wires or hookups. What are these wires supposed to be? R and w?

[Houptee]

You will use b as R and white to W but you need a C wire.

If you have a extra wire in the cable use for C otherwise run a new thermostat cable with 5 conductors to the Nest.

You will need to connect the C at the furnace end.

[Jhonleanmel]

Hey folks,

We appreciate your help here, @Houptee.
@Hoops508, I wanted to follow up and see if you are still in need of any 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.

Thanks,
Mel

[Jhonleanmel]

Hey there,

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

Best,
Mel

[Jhonleanmel]

Hi everyone,

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.

Thanks,
Mel