Thermostat Wiring

[gleemax83]

I have an older house (120 years old), and attempting to switch over to a smart thermostat.  The house is large, 4000 sq. feet.  The main floor and upper floor each have their own ac unit.  The house is heated with a brand new boiler controller and original pipes/system.  There is an air handler that helps circulate and move air.  

On the main floor, I have a separate bundle of thermostat wires that consists of a red wire and a whitish-grey wire.  There is a second bundle of thermostat wires that consists of a red, blue, green, and white wire.  I can get the heat to work correctly, along with getting the fan to kick on and circulate air.  However, I can not get it to kick on the AC unit.  

I can post a picture later this evening if needed.  

Thanks in advance,
Dan

[zoeuvre]

Hi gleemax83,

Thanks for posting here in Community forum, and I'm sorry for the late response. I'd like to take a look at this for you. 

Please help us with the type of Nest Thermostat you have, a photo of the thermostat wires connected to it, and a photo of your system's control panel where the other end of the wires are connected.

I'll look forward to your response. 

Best,

Zoe

[zoeuvre]

Hi there,

I wanted to check and see if you managed to see the information I shared. Please let me know if you have any questions from here. I would be happy to assist and make sure you are good to go.

Thanks,

Zoe 

[zoeuvre]

Hello gleemax83, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you run into any more issues in the future, please feel free to create a new thread.
 

Regards,

Zoe