I had the same problem with mine also.. luckily for me it happened in the first 2 weeks of owning both of them.. I started with a bluetooth version first, within the first week, it did exactly what yours did.. The customer service WAS so good, I returned this one on Amazon, which is super easy, and re-ordered the Wi-fi version directly from Anova.. I received the second unit and enjoyed the Wifi feature and cooked with it almost daily for over a week. I went to use it in one morning to cook some eggs and the temperature went to the moon again, displaying the incorrect temperature. I unplugged it and plugged it back in, it then read that it was 32F when it was actually 182F, I unplugged it again and plugged it back in, it then read -32F.. I contacted Anova again..Strike 2.. customer service on unit #2 was not as good as previously experienced. Returning this unit to Anova is not as easy as Amazon.. I was hoping to have a good experience with Anova, I like the design, the size and the wifi option.. Unfortunately they cannot build a unit to work and last. I have purchased a Sansaire and have used it for almost a month now and have had no problems with it.