You're post above is what i'm leaning towards being the issue....
I'm using two UTH's because I was unable to get the cool side above 74 degrees. After asking around on this forum and talking with a breeder, it was suggested I incorporate another UTH on the cool side and regulate it at a lower temp (i.e. 80) using the Herpstat2.
All temp readings are being taken w/ a temp gun on the cage floor because I have not added substrate yet.
On the bottom of the left side of the PVC enclosure is a small glass area for a UTH which makes it easier to transfer heat unlike the opposite end which is pvc.
This is a brand new Herpstat2. After leaving it on all night, Channel 1 is still around 80 even though it's set to 95 and Channel 2 was around 104 and its set to 100. Both were at 0% which still makes me think it's a Channel 1 issue
since the setting of this Channel doesn't seem to working regardless of which probe is plugged into the unit. I taped (electrical tape) the "wire" right under the probe to the UTH and secured the UTH to the bottom of the enclosure w/ foil tape.