Herpstat 2---Probe placement/ Probe sensitivity?

[michaelt]

I just checked the actual floor of the tub and its 92.5. The probe of the herp stat is 104. I just find that range of temperature gap questionable. Could the probe be bad or going bad? Or am I just being to much of a perfectionist?

If the probe is outside between flexwatt and tub you are going to be running hotter to reach desired temps on the inside from traveling threw tub material and such