Y wire not detected

[srbilla]

All wires detected except Y. Heat works but Cold doesn't. 

Both heat and cold works with old thermostat

RC RH JUMPER wire

RH 

O - 

B

W

Y

G

[EmersonB]

Hi srbilla,

Thanks for reaching out here in the Community. To know more about this issue, I’d like to confirm, where are you located? What type is your HVAC system? Which Nest Thermostat do you have? What are the steps that you've done so far? 

Looking forward to your response.

Regards,

Emerson