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error Google

Error Code E2

No power to the heating system.

? What Causes This

Heating system power disconnected, breaker tripped, or wiring issue.

✓ How to Fix It

Check that the heating system power is turned on.
Verify the circuit breaker for the heating system is not tripped.
Inspect the wiring connections between the thermostat and heating system.
If issue persists, contact HVAC technician.

This error code appears in:

Google Nest Thermostat