Ecobee Thermostat Overshoot / Differential or Sensor Placement Issue

Room temperature overshoots the setpoint by several degrees before shutting off

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Possible Causes

Thermostat installed near supply vent or heat source, Incorrect heat/cool differential settings, Slow-responding radiant system with default settings, Faulty or miscalibrated internal sensor

How to Fix / Troubleshooting

Safety: No electrical hazards. Adjustments are in software and placement.

  • Step 1 – Check thermostat location: Ensure the ecobee is not directly above a supply vent, radiator, or in direct sunlight. If it is, consider relocating it.
  • Step 2 – Adjust thresholds: In Installation Settings > Thresholds, fine-tune the heat and cool differentials and temperature correction to reduce overshoot.
  • Step 3 – Use room averaging: If you have SmartSensors, enable room averaging so the thermostat uses multiple readings instead of just the base unit.
  • Step 4 – Verify sensor accuracy: Compare ecobee’s reading to a reliable thermometer. If consistently off, apply a temperature correction in the settings or replace the thermostat if the error is extreme.
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Repair Difficulty

Easy 2/5
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