How do I fix the LO on my thermometer?
How do I fix the LO on my thermometer? The 'Lo' or 'Hi' indications on the display mean that the temperature cannot be measured because the temperature is outside the temperature range. Press the on/off button to switch off the thermometer. Check if it is correctly positioned, press the on/off button again to switch it on, and re-start the measurement. What does Lo mean on exergen thermometer? Showing 1-3 of 3 answers. Most of the Exergen devices will either flash BATT or have a battery level icon showing when the battery is low. In the manual it shows LO as...