cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
Help
Replies are disabled for this topic. Start a new one or visit our Help Center.

Nest 4th gen low power but had no issue with 3rd gen

Jkennedy89
Community Member

‎01-14-2025 05:33 PM

Hello I recently just upgraded from the nest 3rd gen (had for several years now) to the 4th gen. The 4th gen is working fine but comes up with a low power error on the Home app and on the thermostat. I do not have a C wire only a W1 and RH wire (forced air heat). I have it hooked up the exact same as my nest 3rd gen was and I had no issues and no errors on the 3rd gen ever in the 4 years or so I've used it. Is the 4th gen more sensitive to the power or am I missing something. Other than the error, it seems to be working normally.

0 Kudos
Reply
1 REPLY 1

Patrick_Caezza
Diamond Product Expert
Diamond Product Expert

‎01-16-2025 01:31 PM

@Jkennedy89 

The 4th Gen thermostat draws more power than the 3rd Gen one.

A 2-wire heat-only system seems to always cause power problems and this is one reason I always recommend installing a C wire or the Nest Power Connector.

What type of heating system do you have installed?


To ensure that I see your reply, please tag me using @Patrick_Caezza
Reply