Home Product SupportIdentify a code

Google Nest thermostat · exact code

Google Nest thermostat code E52, E102, E182 and the other overcurrent codes: meaning and exact next steps

E52, E102, E182 and the other overcurrent codes means The thermostat detected an overcurrent on one of its wires. Google says its internal breaker has tripped 10 or more times, which means a recurring problem that will not go away by itself. Which wire to check depends on the code: E52, E102 and E182 are W1; E53, E103 and E183 are Y1; E54, E104 and E184 are G; E55 and E105 are O/B; E56 and E106 are W2/Aux; E57 and E107 are Y2; E58, E108 and E188 are the star or star/O-B terminal. 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, E52, E102, E182 and the other overcurrent codes means the thermostat detected an overcurrent on one of its wires. Google says its internal breaker has tripped 10 or more times, which means a recurring problem that will not go away by itself. Which wire to check depends on the code: E52, E102 and E182 are W1; E53, E103 and E183 are Y1; E54, E104 and E184 are G; E55 and E105 are O/B; E56 and E106 are W2/Aux; E57 and E107 are Y2; E58, E108 and E188 are the star or star/O-B terminal. First, restart the thermostat only if it is frozen and you cannot reach its menu: press and hold the ring about 10 seconds until the screen goes off.

Part of Google Nest thermostat error codes guide

Try in this order

0 of 2 completed

  1. What to do first

    Reversible

    Restart the thermostat only if it is frozen and you cannot reach its menu: press and hold the ring about 10 seconds until the screen goes off.

  2. Correct only the documented fault domain

    Reversible

    Google's causes: a wire in the wrong connector, more than one wire in one connector, a humidifier or dehumidifier connected to the system, a worn or failed relay or transformer on the system's control board, recent electrical work in the home, or recent service on the system. Its steps: turn the power off, pull the display, check the connector for the wire named in the table has exactly one wire (no jumpers), check that it matches the setup wiring diagram, and if you have both Rc and Rh wires make sure they were not swapped. A worn part on the control board needs a professional.

Evidence ledger

Sources behind this answer

01
Google Nest Help Troubleshoot a Nest thermostat overcurrent or E help code

Exact questions

Common questions about “Google Nest thermostat code E52, E102, E182 and the other overcurrent codes”

What does E52, E102, E182 and the other overcurrent codes mean on a Google Nest thermostat?+

The thermostat detected an overcurrent on one of its wires. Google says its internal breaker has tripped 10 or more times, which means a recurring problem that will not go away by itself. Which wire to check depends on the code: E52, E102 and E182 are W1; E53, E103 and E183 are Y1; E54, E104 and E184 are G; E55 and E105 are O/B; E56 and E106 are W2/Aux; E57 and E107 are Y2; E58, E108 and E188 are the star or star/O-B terminal.

Wrong device or version?

Match the path before repeating the steps.

Match another device