I actually have a video where it's making this rapid clicking sound. I sent an email to reptile basics where I bought both and I am waiting for a response. The VE 200 did this once before on my incubator but I missed it. My thermometer in my incubator will show a high and low temp for a time range. I noted a week before it went out it got down to 82. But by the time I got to my reptile building, the Temps had already come up to normal 89 degrees. I'll keep e eryone posted on what happens. I hope my clutch doesn't have any negative side effects from the temp fluctuations.