Thermostat power question. Do i have to turn the power off to install

[BTN]

I thermostat has a battery bavkup and when i turn the breaker off it holds power. Trying to install your thermostat do i have to have the power off to install 

[CoolingWizard]

The power you are turning off is the power to the HVAC system that sends power to the thermostat. The batteries in your old thermostat do not matter.  If you have a split system the indoor unit, the air handler and possibly gas furnace is the unit to turn off.

Ken, The AC Cooling Wizard

[Jhonleanmel]

Hey folks, 

We appreciate your help here, CoolingWizard.
BTN, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,
Mel

[Jhonleanmel]

Hey there,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

[EmersonB]

Hi everyone,

@BTN just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

I appreciate the help, Mel and Ken.
 
Regards,
Emerson