Identifying old thermostat wiring

[his2020]

Please help identify this wiring. I have a Nest thermostat and can't insert 2 wires in 1 terminal as shown here.  Thanks.

[Patrick_Caezza]

@his2020 

You will need to look in the furnace/air handler and see what the wires in the Y and R terminals are connected to.

Post a picture of the wiring there.

[Jake]

Hey there,

Thanks for the help Patrick_Caezza.

I wanted to check in and see if you managed to see Patrick_Caezza's post. 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.

Best regards,
Jake

[his2020]

Hi. Thanks for responding. I took Patrick's suggestion and opened the air handler. There were 4 wires in there, red, white, yellow and green. The 2 additional wires are from a humidistat (I'm in Florida). Apparently, the Nest isn't compatible with it, so I connected just the 4 wires and the air conditioner is working fine.

[Jenelyn_O]

Hi there,

Thanks for the update. I'm sorry for the delay. I'm glad that it was sorted out. Please let us know if you still have questions or concerns. Otherwise, I'll be locking this thread after 24 hours. 

I appreciate your help, @Patrick_Caezza and Jake. 

Regards,

Jenelyn