Home Product SupportIdentify a code

Google Nest thermostat · exact code

Google Nest thermostat code E10, E30, E66, E80, E116, E160, E196, E296, M13: meaning and exact next steps

E10, E30, E66, E80, E116, E160, E196, E296, M13 means The thermostat detects no power to the Y1 wire, which Google labels a cold-weather shutoff. Nest thermostats can use the Y1 (air conditioner) wire to keep charged when there is no common wire, and an air conditioner's low-pressure safety switch can stop sending that power in very cold weather. Google also says the cause can simply be a system that needs maintenance. This answer applies only to Google Nest Learning Thermostats (1st through 4th generation), the Nest Thermostat E and the Nest Thermostat that show a lettered help code on the display or in the Nest or Google Home app. Google prints one meaning for the aliases it groups together, and this page keeps that grouping. Codes shown by other brands of thermostat are on their own pages.

On the covered Google Nest thermostat, E10, E30, E66, E80, E116, E160, E196, E296, M13 means the thermostat detects no power to the Y1 wire, which Google labels a cold-weather shutoff. Nest thermostats can use the Y1 (air conditioner) wire to keep charged when there is no common wire, and an air conditioner's low-pressure safety switch can stop sending that power in very cold weather. Google also says the cause can simply be a system that needs maintenance. First, charge the thermostat if it will not turn on, using a USB charger for 5 to 10 minutes or new AAA batteries if it takes them.

Part of Google Nest thermostat error codes

Try in this order

0 of 2 completed

  1. What to do first

    Reversible

    Charge the thermostat if it will not turn on, using a USB charger for 5 to 10 minutes or new AAA batteries if it takes them.

  2. Correct only the documented fault domain

    Reversible

    Google's quick fix to get heat back: turn the system power off, pull the display, photograph the wires, remove any Y wires (Y, Y1 or Y2) and, if both are present, the Rc and Rh wires too, wrap each removed wire's bare end in electrical tape, press the display back on and restore power. You will not be able to use the air conditioner until the Y1 wire is reconnected. The permanent fix is a common wire or the Nest Power Connector, installed by you or an HVAC professional. For E296, Google's step is to check and replace the batteries, then install a common wire or Power Connector.

Evidence ledger

Sources behind this answer

01
Google Nest Help Troubleshoot E10, E30, E66, E80, E116, E160, E196, E296, M13, N262, N263, N412, and N413 help codes

Exact questions

Common questions about “Google Nest thermostat code E10, E30, E66, E80, E116, E160, E196, E296, M13”

What does E10, E30, E66, E80, E116, E160, E196, E296, M13 mean on a Google Nest thermostat?+

The thermostat detects no power to the Y1 wire, which Google labels a cold-weather shutoff. Nest thermostats can use the Y1 (air conditioner) wire to keep charged when there is no common wire, and an air conditioner's low-pressure safety switch can stop sending that power in very cold weather. Google also says the cause can simply be a system that needs maintenance.

Wrong device or version?

Match the path before repeating the steps.

Match another device