Ecobee3 Thermostat Sensor Issues

April 22, 2017

Smart thermostats can be an excellent tool to help you save on your electric bill. But when you have malfunctioning equipment, that electric bill could go sky high. If you have the Ecobee3 Wi-Fi Thermostat with Remote Sensor, have you noticed a spike in your power usage? One of our own here at Enlight recently encountered this problem, and here’s what we found out:

The Problem

The temperature in your house may not feel comfortable, and your thermostat is reading a different temperature than what you feel in your home. Or, your thermostat puts out a different temperature than your scheduled one while away. The latter issue is a bit harder to diagnose without logging into your Ecobee account and your electric bill online to see the daily usage. We recommend checking your account online versus the app if you notice a spike in your energy bill. You can see more detailed information on the browser version.

Another common issue we see occurring with the sensors is the sensor reading the room as occupied when empty. This misread can cause your HVAC unit to work harder to keep the correct temperature for an occupied room.

A Possible Solution

First, troubleshoot to see if your sensors are the problem. Place a possibly defective sensor next to the main unit, within one foot, to see if it is reading out the correct temperature. This Ecobee3 sensor malfunction seems to occur fairly frequently. However, there is a simple solution: change the sensor’s batteries. Since the sensors do not have a battery sensor or any way to indicate the main unit when low, you should keep an eye on your usage to make sure they remain functional. The sensors use a coin cell battery (CR2032) for use. These should last about four years. But we all know that isn’t always the case.

If you continue to have issues with the Ecobee3 Wi-Fi Thermostat’s sensors after changing out the batteries, we recommend calling Ecobee’s support to ask for replacement units.

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