Thermostat arrived - not working right.

[Starbuck]

what kind of thermometers are you using to monitor your hot side? If they are just stick on the wall types; it is irrelevant what they say, as they will be reflecting ambient temperatures...

if they are the probe type, i would place the thermometer probe directly next to where your thermostat probe is (which should be where the snake is), so that you can accurately determine the temp at the hottest point (by the snake, over the uth).