Jen legood21-01-2020 Lo can mean the room you are taking temp in is less than 17 degrees try in a warmer room .
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SMcC22-09-2019 I have exactly the same issue. I’ve tried several different batteries and get this message straight after changing.
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Nick Roe01-11-2020 This happened to me, too. I cured it by cleaning out the tip of the thermometer, which had developed an almost-invisible coating of earwax (yuk). Once properly cleaned, it functioned normally again.
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