No, the probe was in place, it was reading 91 even (what it's set to) and it was actually 105-110. I switched the probes and it still did the same thing. It basically stopped reading heat on the probe, and allowed the temp. to ramp up. Being that no animals where burned it must have shut off at some point, or I caught it at the right time. It's done this before, I wrote it off as a minor malfunction the first couple of times but now I'm just going to exchange it, it's clearly defective. I was really lucky none of my animals where hurt, my male likes to pull his hide forward when he isn't digesting a meal and both my females where off the hotspot. I feel really bad for even putting them in this situation, I should've exchanged it the first time it screwed up, or at least the second.