Nest Learning Themostat Turning AC on and off even when Thermostat is set to OFF

[itemdefect]

I received a Nest Learning through the LADWP rebate program and the thermostat randomly turns on and off the A/C when the Thermostat, Google Home App, and Nest App say the thermostat is set to OFF mode. Only way to actually turn off the A/C is to unplug the Thermostat from the base. When I reconnect my old manual thermostat it works fine, turning on only when it should be on. Only thing I can think might be causing an issue is that my HVAC has two zones with two thermostats on a single unit but I only have Nest installed on one and the other is still has an old, manual thermostat. Any advice/help will be greatly appreaciated

Attached are photos of the old wiring and the new. The black wire is actually the white wire with some heat shrink over it.

New Wiring and A/C goes off when thermostat is set to OFF modeOld Wiring and Working

[Ryan_G]

Hi itemdefect,

Thanks for reaching out here in the Google Nest Community and we're sorry for the delay.

Have you tried transferring the Red wire from Rh to Rc? Also, make sure to select the right heating source and type in settings > equipment.

Let me know how it goes by replying to this thread.

Regards,

Ryan

[MelbaDT]

Hey there, 

Checking back in — have you had the chance to try the suggestion above? If yes, how was it?

Best, 

Melba

[MelbaDT]

Hi, 

We haven't heard from you in a while so we'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the Community.

Best, 

Melba