no power, E72

[jim28]

if 3rd generation nest shows 24 v power on wires before connection but shows no power and voc and vin 0.02 vin 8 ma, is the issue thermostat or its base?  All connections appear appropriate.  Thanks

[Ryan_G]

Hey jim28,

Thanks for reaching out here in the Google Nest Community.

We couldn't say yet if it is the Nest Thermostat display or the base has the problem until we get through some troubleshooting. The first thing to check is the system power. We'll need to make sure we're getting enough power from the HVAC unit to the Nest Thermostat. Here's another set of things to check on the wire:

• Check that each wire is fully inserted into its connector and that every connector with a wire is down.
• Check that each wire has ⅜ inch (6mm) of exposed wire.
• Turn the power to your system back on and check to see if your thermostat is working.
• Check that each wire is connected properly to the system board.

Let us know how it goes by replying to this threads.

Best regards,

Ryan

[MelbaDT]

Hey there, 

Checking back in — how's it going? Have you had the chance to try the suggestions above?

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