Maybe I got it

[Francesco]

I tried to put the probe under the bark in the middle of heat pad and it went up over 100. So now when I get the thermostat where would I set the temperature of the mat?

[ogdentrece]

When you say the hot side temps are 83, is that ambient or floor or both? If you are using a UTH the floor temps would proabably be muchhh higher than the ambient temps. I have a fairly standard ambient temp of about 82-85 from cool to hot side, but my floor temps get to 93 from the UTH. My heat gradient is more on the floor than in the air, which is fine and I think most have this. This is fine. So you really should monitor floor temps more if you are using a UTH, the bulb is only necessary to raise ambient temps if they drop below 78.

Thermostat probe best between the mat and the glass or plastic surface. It should be set on say about 90..? so that the maximum temperature on any surface inside is 92 - especially with on/off ones, if you set it to 90, it usually goes up to about 92-93 and drops down to 88-89. And that gives you room for the 2 degree inaccuracy.

[Francesco]

Ok. Ya I don't have the uth plugged in right now but I put the probe close to the top of the hide and hot side is about 90 to 91. And it's dropping now it's 11 pm. To 89 88?

[Vypyrz]

Ok unplugged uth pad. We will see what happens
They will be fine without it. And just the heat lamp on?

As long as the heat lamp keeps the warm side around 91 or so, it will be fine until the thermostat arrives.
Unregulated UTH's are probably the #1 cause of thermal burns because they can get alot hotter than people think.

[Vypyrz]

Ok. Ya I don't have the uth plugged in right now but I put the probe close to the top of the hide and hot side is about 90 to 91. And it's dropping now it's 11 pm. To 89 88?

The slight drop in temp will be ok. A slightly cooler warm side is still better than a UTH that is cooking at 100+ degrees.

*EDIT* I would suggest playing it safe and not feeding your snake until you get the thermostat up and running and the temps stable.