Nest - none learning thermostat

[Hazmathome]

I have 2 current thermostats on one a/c units 5 wires. Y1, G, R, C and W/0/b(combined). I thermostat for each floor. Again both run to same AC unit. Hooked up the 2 nest thermostats and all works good. 

I have a 2nd a/c unit in a mother in law site above garage. It has the EXACT same wiring and was using the same model thermostatas the 2 in the house. I hooked it up exactly the same as the 2 in the house and it keeps telling me NO WIRES connect after I turn power back on. 

please help 

 

[CoolingWizard]

@Hazmathome 
If the Nest Thermostat is saying there are no wires attached, the backplate is not registering the wires that are inserted.   This is likely a defective backplate.   Can you use the Nest App, go to Technical Information and see if the thermostat sees the backplate and reports the serial number and firmware  version. 

AC Cooling Wizard

[Jake]

Hey Hazmathome,

Thanks for the help CoolingWizard.

I wanted to check in and see if you managed to see CoolingWizard'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

[Jake]

Hi Hazmathome,

I wanted to check in and see if you are still in need of any help. Please let me know, as I would be happy to assist, and answer any questions you may have.

Best regards,
Jake

[Jake]

Hey there,

I wanted to check in, and let you know that I will be locking the thread in 24 hours.

Best regards,

Jake