I looked for a thread like this so it isn't a repost, but I couldn't find this particular question. I have a zoo med UTH connected to a Jump Start thermostat, and I followed the guideline here to make sure I did it correctly. (You probably know the one; looks like crayon) So that's probably not the issue.

What IS driving me crazy is that my thermostat and probe thermometer temperatures are different on the warmer side. No matter what temp I set the thermostat, the thermometer is off by a solid five degrees at least. For example, I set my thermostat to 92, my thermometer reads 87. Should they both read the exact same? I don't know which one to trust. I loaned my temp gun to a friend who just got a new BP so in a few days I can just figure it out, but in the meantime I don't want to cook or freeze my snake.

Sorry for the long post. I am a bit frustrated right now. :/