Troubleshooting your glucose device (glucometer)

Below are the following error types for the iHealth glucose meter, what they mean, and what you should do. 

Message: Lo

What this means: Your blood glucose level is lower than 20mg/dL (1.1mmol/L)

What you should do: Repeat the test using a new test strip. If your result still flashes "Lo", then seek medical advice immediately.

Message: Hi

What this means: Your blood glucose level is higher than 600 mg/dL (33.3mmol/L)

What you should do: Wash and dry you rhands, and the test site, thoroughly. Repeat the test using a new test strip. If your device still flashes "HI" seek medical advice immediately. 

Message: Er0

What this means:The battery in your meter is low

What you should do: Charge the device.

Message: Er2

What this means: Problem with the meter.

What you should do: Re-test with a new test strip. If the problem persists, call iHealth Labs Customer Service at 1-855-816-7705

Message: Er4

What this means: Problems have occurred that are related to test strip use.

  • The test strip may be wet.
  • The Test strip may have been removed too soon.
  • You applied more blood after testing began.

What you should do: re-test using a new test strip.

Message: Er5

What this means: The environmental temperature is lower than 50 degrees F (10 degrees C).

What you should do: Go to a warmer environment and try the test again.

Message: Er6

What this means: The environmental temperature is higher than 104.

What you should do: Go to a cooler environment and try the test again.

Message: Er8

What this means: Communication error.

What you should do: Touch START to re-test.

Message: Er9

What this means: strip removed during measurement.

What you should do: start using a new test strip.

Message: ErC

What this means: Your meter is not synced to the app on your iOS device yet.

What you should do: Work through the steps to set up your glucometer.

Message: Erd

What this means: there are no new test strips in the vial.

What you should do: Scan a new vial of test strips.

Message: ErE

What this means: the test strip has expired. 

What you should do: use a new test strip.

Message: ErF

What this means: you cannot charge the device and take a measurement.

What you should do: unplug the charger and try taking your reading again.

Message: Blank (No message)

  • The battery may be too low. Try charging your device. 
  • Too much time may have passed between inserting a test strip and performing the test.
  • Test strip has not been fully inserted into the meter.

What does the "Erd" error mean?

  • If you run out of test strips, you will see an error message (see below). 
  • You will need to open a new vial of test strips. 
  • Your Glucometer will shut off automatically when you run out of test strips and will not take any new measurements until you have opened and scanned a new vial of test strips.

How to re-order iHealth Glucometer test strips in the Noteworth app

Click here to re-order iHealth Glucometer test strips on Amazon

You can easily re-order Glucometer test strips directly from the Noteworth app. When taking a blood glucose reading, you'll see a link for "ORDER SUPPLIES". Click on the link to be directed to the official iHealth Amazon store. 

Still having trouble?  


If you still need additional help, don't hesitate to reach out to us at Noteworth at help@noteworth.com. You can also select " Contact Noteworth Support" in the settings page on your app to email Noteworth directly from your smartphone.
If you run into trouble, you can always call our support line: 888-983-1673
We are available for live support from 9:00 AM to 6:00 PM ET.


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