Nest Thermostat Wiring Question

[Elynde]

Original thermostat had G, O, Y, and RC wires coming from the wall, but O has two wires connected to it (five wires from the wall not including the jumper). The system is an electric heat pump/AC combo. Am I supposed to put two wires into the O space on the Nest?

[Patrick_Caezza]

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

[Elynde]

Photo 

Please forgive the horrible mess back there. The place was infested when we bought it and, although we have won the battle, we still find evidence of the past in undisturbed places (like behind the faceplate of an ancient thermostat)

[Elynde · Accepted solution]

Nevermind. Hired an AC tech. They installed a c wire and changed a setting inside the Nest thermostat to acknowledge the heat pump. It is working now.

[aatienza]

Hey Elynde,

@Patrick_Caezza, thanks for the help! Let us know if you have any other questions, we're here to help.

Thanks,

Archie

[aatienza]

Hey Elynde,

I'd like to bump in here to 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.

Thanks,

Archie