My Ooni Karu 16 thermometer is displaying 'LLL', 'HHH' or '---'.
July 10 2024 12:38pmIf your Ooni Karu 16 thermometer is displaying the following:
'LLL' - the minimum internal temperature has been reached (ie. below freezing). Allow your Karu 16 to increase in temperature for the thermometer to display a reading.
'HHH' - the maximum internal temperature is reached, open Karu 16 door to reduce the temperature within the oven.
'---' - This will display if the thermometer cable has not been connected to the Jack Bracket.
If you find the problem is unrelated to the above, follow the below steps:
Step 1. Ensure the oven has cooled down completely.
Step 2. While wearing protective gloves, wipe down the thermocouple (pictured below) with a dry paper towel. This will remove any soot or residue that may prevent your thermocouple from reading an accurate temperature.
Step 3. Wipe down the thermocouple jack (pictured below) with a dry paper towel. You can even use sandpaper to help roughen it up to create a more substantial contact.
Step 4. If you still have issues after following the steps above, replace the thermometer's batteries.