Fist check to see if the uth is on, if it's warm or not. If it's cold there are a few possibilities and I would start trouble shooting by following all the cables to make sure their plugged in propperly. uth to the thermostat , thermostat to surge protector, surge protector to wall...ect. If their is a surge protector check that its also switched to the on position.
I would double check the cables again to make sure it's not a cord unplugged. if everything seems good and plugged in the next step would be checking the outlet your using , plug in a lamp or a known working appliance, if they work then it might be the uth is broken or possibly the thermostat is.
With your snake safely removed from the cage unplug your uth from your thermostat and plugg it into an outlet of see if it heats up.
if it does heat up then your thermostat has an issue. check the manufactures manual for settings or if possible call them to report the issue. let us know what happens, someone here can probably help you figure out what's going on.
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