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error Google

Error Code E4

Temperature sensor error — the thermostat cannot accurately read the current temperature.

? What Causes This

Faulty temperature sensor, loose sensor connection, or sensor malfunction.

✓ How to Fix It

  1. Check the temperature sensor connection for loose wires.
  2. Verify the sensor is not damaged or obstructed.
  3. Calibrate the thermostat through Settings > Temperature Calibration.
  4. If error persists, the sensor may need replacement by a technician.

This error code appears in:

Google Nest Thermostat