Quote Originally Posted by chrid16371 View Post
I have different wattage heat mats but they all have there own thermostat probe.
That may be the reason in part for the fluctuation. 1f - 3f i think is reasonable but 5f is a bit questionable. I think there is a wattage capacitance threshold with the different heating elements though. Just monitor it for now though. i would say over the next 24 hours if you are still noticing the issue w/o improvements to speak to customer service for a more detailed explanation. They have a great customer service as you probably already know. Maybe another member has another take on this.