How to fix an "Err" message on your thermometer


 Encountering an Err message on your Smart Ear thermometer can be perplexing, but fear not! We're here to decode this issue and provide you with a step-by-step guide to troubleshoot and resolve it effectively.

Understanding the Err Message

An Err message might pop up on your thermometer's display due to various reasons, which include:

  1. Preheated Sensor: The sensor being too warm before powering on the thermometer can trigger an Err message.
  2. Incomplete Reading: Incomplete temperature readings may lead to the appearance of the Err message.
  3. Internal Malfunction: At times, the thermometer might face an internal glitch, resulting in the Err message.

Troubleshooting the Err Message

To rectify the Err message and ensure accurate temperature readings, follow these straightforward steps:

Step 1: Ensure Sensor Clearance

  1. Turn Off the Thermometer: Hold down the round button to power off the thermometer.
  2. Check for Obstructions: Examine the sensor area for any obstructions like earwax or dirt. Clear away any impediments that might hinder accurate readings.
  3. Quick Cleaning: If the Smart Ear is dirty, perform a swift cleaning using alcohol and a cotton swab.
  4. Turn On the Thermometer: Click the round button to turn on the thermometer. Remember to activate the thermometer before placing the sensor in the ear canal for accurate readings.

Step 2: Resetting the Thermometer

For Smart Ear without a Side Button:

  1. Battery Cover: Slide the battery cover downwards and remove it.
  2. Remove the Batteries: Take out the batteries.
  3. Wait: Allow a 10-second interval.
  4. Reinsert the Batteries: Put the batteries back, following the orientation guide within the battery compartment.
  5. Complete the Reset: Push the round button to turn on the thermometer, finalizing the reset process.

For Smart Ear with a Side Button:

  1. Turn On the Thermometer: Push and release the round button to power on the thermometer.
  2. Button Combination: Push and hold both the round button and the small side button simultaneously.
  3. Bluetooth Signal: Keep holding both buttons until the display's Bluetooth symbol starts flashing.
  4. Reset Successful: Congratulations! Your thermometer has been successfully reset, addressing the issue.

Further Assistance

Should the Err message persist even after executing the aforementioned steps, don't worry. Our Customer Happiness team is here to provide you with the necessary support. Reach out to us and mention that you've followed the "Fix Err on Smart Ear" guide. We'll be more than happy to assist you and ensure your Smart Ear thermometer functions flawlessly.


Technology might occasionally throw a curveball our way, but with the right guidance, resolving issues like Err messages becomes a breeze. By adhering to the troubleshooting steps outlined in this guide, you're equipped to tackle any hiccup your Smart Ear thermometer may encounter. Accurate temperature readings are just a few steps away!

Remember, a seamless experience with your Smart Ear thermometer is our priority. Let's keep those temperatures accurate and your health in check!

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